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Erik Stubkjær - One of the best experts on this subject based on the ideXlab platform.

  • SUPPORTING FISCAL ASPECT of LAND ADMINISTRATION THROUGH a LADM-BASED VALUATION Information Model
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    This paper presents an Information system artifact for the fiscal aspect of land administration, a valuation Information Model for the specification of inventories or databases used in valuation for recurrently levied immovable property taxes. The Information Model is designed as an extension module of ISO 19152:2012 Land Administration Domain Model (LADM), which is an international standard for land administration. LADM Valuation Information Model is supposed to facilitate all stages of immovable property valuation, namely the identification of properties, assessment of properties through single or mass appraisal procedures, generation and representation of sales statistics, and dealing with appeals. Therefore, it enables the recording of data concerning the parties that are involved in valuation practices, property objects that are subject of valuation, their characteristics and other datasets used for and produced within single and mass appraisal procedures. Moreover, it enables development of valuation maps, and property price records needed to assess changes in property values, as addressed by the New Urban Agenda which is as an extension of 2030 Agenda for Sustainable Development for urban areas (cf. Clause 104). The ultimate purpose of this research is to provide governments with a common basis for the development of local or national databases, enable integration of valuation databases with cadastral databases, and guide the private sector in the development of Information technology products.

  • The LADM Valuation Information Model based on INTERLIS
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    The geometric, legal, physical, economic, and environmental characteristics of property units are utilized in valuation activities. Property valuation registries and databases are supposed to record these characteristics in relation to property units that are subject to immovable property valuation. Moreover, the links between valuation registries and the other land administration registries such as cadastre, land registry, building and dwelling should be specified. Apart from procedural valuation standards, there is no internationally accepted data standard that defines the links and semantics of property valuation databases. The ISO 19152:2012 Land Administration Domain Model (LADM), as an international land administration standard focuses on legal requirements, but considers out of scope specifications of external Information systems including valuation and taxation databases. A recently started joint activity under International Federation of Surveyor s (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has developed an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation . This paper investigates the use of INTERLIS tools f or the technical implementation of the Valuation Information Model, which has been develop ed as a valuation extension of ISO 19152:2012 Land Administration Domain Model (LADM). INTERLIS is a Swiss standard that enables Modelling and integration of geographic data sets. It provides a conceptual schema language that can b e used to specify a data Model in a neutral system environment, similarly, class diagrams of th e Unified Modeling Language (UML). It is compatible with international standards like UML , XML and GML. INTERLIS also provide some tools for the implementation of conceptual Models into technical Models. The core LADM, a number of the ISO191xx base Models and some LADM country profiles were already expressed in INTERLIS standard. This paper presents definition of classes, code lists and constraints of the LADM Valuation Information Model and its Turkish Country Profile i n INTERLIS. It also discusses possible advantageous of INTERLIS tools (UML editor, compile r, checker, validator and loader) such as system neutral data exchange format, compatibility with relevant international standards, reusable and extensible conceptual schema language, and automatic translation from the conceptual Model to physical Model.

  • A Database Implementation of LADM Valuation Information Model in Turkish Case Study
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently started joint activity under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The conceptual Model was represented through class diagrams of the Unified Modeling Language (UML). This paper describes the development of a prototype for the implementation of the conceptual Model in terms of a Turkish case study. The main aim of this paper is to assess and improve the proposed conceptual LADM Valuation Information Model. In the development part, the classes, attributes, constraints, cardinalities and relations between classes of the conceptual Model were converted to technical (physical) Model, namely the Oracle Spatial 11g database schema has been generated from the conceptual Model definitions. The conceptual schema definitions were implemented into the database, which next was loaded with sample datasets related to property valuation and taxation in Turkey. The sample data includes valuation units that are the subjects of recurrently levied property taxes in Turkey, such as unimproved urban parcel and parcel and improvements together as condominium property, valuation and taxation Information of the valuation units in different years, and as well as geometries of valuation units. The technical Model of LADM Valuation Information Model Turkish Country Profile has been tested in evaluation phase through SQL queries and visualization tools, respectively. In this phase, it is investigated that whether the both conceptual and technical Models fulfill the needs of Information management aspects of valuation activities for property taxation.

  • Towards Turkish LADM valuation Information Model country profile
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently established joint working group under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started the development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on international standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The planned further works include (i) creating country profiles, and (ii) development of prototypes for the assessment of country profiles and conceptual Model itself. This paper presents an overview of immovable property valuation conducted for taxation purposes in Turkey. Based on this overview, it also proposes a country profile of LADM Valuation Information Model in Turkey case. The country profile covers valuation activities for annually levied recurrent property taxes (i.e. Land Tax and Building Tax) in Turkey, characteristics and spatial aspects of valuation units used in property valuation, property valuation approaches employed for property taxation, transaction prices used in valuation procedures, parties involved in valuation practices, and Information on taxes on immovable property. The profile also includes the content of code lists that detail administrative valuations in relation to property tax assessments in Turkey. The proposed profile is evaluated with Unified Modeling Language (UML) instance level diagrams in examples of property taxes on land and building in Turkey for assessing whether the profile fulfills the needs of Information management aspects of valuation activities for property taxation. Towards

Abdullah Kara - One of the best experts on this subject based on the ideXlab platform.

  • Towards the Netherlands LADM Valuation Information Model Country Profile
    2019
    Co-Authors: Abdullah Kara, Ruud Kathmann, Christian Lemmen, Peter Van Oosterom, Umit Isikdag
    Abstract:

    In this paper, an overview of property valuation system and practices in the Netherlands are described within the context of LADM Valuation Information Model. The paper also includes the development of the Netherlands Country Profile of LADM Valuation Information Model. A collaborative research initiative has proposed an international valuation Information Model that extends the ISO 19152:2012 Land Administration Domain Model (LADM) for specifying semantics of valuation registries maintained by public authorities. The proposed Model was created based on the specifications of international standards; literature survey and data acquired from questionnaires responded by the national delegates of FIG Commission 9 and FIG Commission 7. Recently, the Model has been updated according to the outputs of the seventh LADM Workshop, Information gained from personal communications, and the results of previous tests and assessments. It has been decided that the Model should be evaluated with new country profiles and prototype systems. This paper firstly examines the public property valuation system and practices in the Netherlands in terms of property valuation legislation, WOZ-value (the official assessed value), the usage areas of the WOZ-value, valuation approaches, revaluation, indexing and dissemination of the WOZ-values. Secondly, the required data sets for property valuation and their data sources are identified considering the related legislation and the System of Key Registers in the Netherlands. The obtained Information is used to develop the Netherlands Country Profile of the LADM Valuation Information Model. It is noted that the country profile covers transaction prices used in valuation procedures, parties involved in valuation practices, and market analysis Information. It is proved that LADM Valuation Information Model provides a decent basis to represent property valuation system in the Netherlands. The results of the study will be used to evaluate LADM Valuation Information Model and input will be provided to LADM v2.0 revision within ISO TC 211 and OGC.

  • SUPPORTING FISCAL ASPECT of LAND ADMINISTRATION THROUGH a LADM-BASED VALUATION Information Model
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    This paper presents an Information system artifact for the fiscal aspect of land administration, a valuation Information Model for the specification of inventories or databases used in valuation for recurrently levied immovable property taxes. The Information Model is designed as an extension module of ISO 19152:2012 Land Administration Domain Model (LADM), which is an international standard for land administration. LADM Valuation Information Model is supposed to facilitate all stages of immovable property valuation, namely the identification of properties, assessment of properties through single or mass appraisal procedures, generation and representation of sales statistics, and dealing with appeals. Therefore, it enables the recording of data concerning the parties that are involved in valuation practices, property objects that are subject of valuation, their characteristics and other datasets used for and produced within single and mass appraisal procedures. Moreover, it enables development of valuation maps, and property price records needed to assess changes in property values, as addressed by the New Urban Agenda which is as an extension of 2030 Agenda for Sustainable Development for urban areas (cf. Clause 104). The ultimate purpose of this research is to provide governments with a common basis for the development of local or national databases, enable integration of valuation databases with cadastral databases, and guide the private sector in the development of Information technology products.

  • The LADM Valuation Information Model based on INTERLIS
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    The geometric, legal, physical, economic, and environmental characteristics of property units are utilized in valuation activities. Property valuation registries and databases are supposed to record these characteristics in relation to property units that are subject to immovable property valuation. Moreover, the links between valuation registries and the other land administration registries such as cadastre, land registry, building and dwelling should be specified. Apart from procedural valuation standards, there is no internationally accepted data standard that defines the links and semantics of property valuation databases. The ISO 19152:2012 Land Administration Domain Model (LADM), as an international land administration standard focuses on legal requirements, but considers out of scope specifications of external Information systems including valuation and taxation databases. A recently started joint activity under International Federation of Surveyor s (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has developed an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation . This paper investigates the use of INTERLIS tools f or the technical implementation of the Valuation Information Model, which has been develop ed as a valuation extension of ISO 19152:2012 Land Administration Domain Model (LADM). INTERLIS is a Swiss standard that enables Modelling and integration of geographic data sets. It provides a conceptual schema language that can b e used to specify a data Model in a neutral system environment, similarly, class diagrams of th e Unified Modeling Language (UML). It is compatible with international standards like UML , XML and GML. INTERLIS also provide some tools for the implementation of conceptual Models into technical Models. The core LADM, a number of the ISO191xx base Models and some LADM country profiles were already expressed in INTERLIS standard. This paper presents definition of classes, code lists and constraints of the LADM Valuation Information Model and its Turkish Country Profile i n INTERLIS. It also discusses possible advantageous of INTERLIS tools (UML editor, compile r, checker, validator and loader) such as system neutral data exchange format, compatibility with relevant international standards, reusable and extensible conceptual schema language, and automatic translation from the conceptual Model to physical Model.

  • A Database Implementation of LADM Valuation Information Model in Turkish Case Study
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently started joint activity under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The conceptual Model was represented through class diagrams of the Unified Modeling Language (UML). This paper describes the development of a prototype for the implementation of the conceptual Model in terms of a Turkish case study. The main aim of this paper is to assess and improve the proposed conceptual LADM Valuation Information Model. In the development part, the classes, attributes, constraints, cardinalities and relations between classes of the conceptual Model were converted to technical (physical) Model, namely the Oracle Spatial 11g database schema has been generated from the conceptual Model definitions. The conceptual schema definitions were implemented into the database, which next was loaded with sample datasets related to property valuation and taxation in Turkey. The sample data includes valuation units that are the subjects of recurrently levied property taxes in Turkey, such as unimproved urban parcel and parcel and improvements together as condominium property, valuation and taxation Information of the valuation units in different years, and as well as geometries of valuation units. The technical Model of LADM Valuation Information Model Turkish Country Profile has been tested in evaluation phase through SQL queries and visualization tools, respectively. In this phase, it is investigated that whether the both conceptual and technical Models fulfill the needs of Information management aspects of valuation activities for property taxation.

  • Towards Turkish LADM valuation Information Model country profile
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently established joint working group under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started the development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on international standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The planned further works include (i) creating country profiles, and (ii) development of prototypes for the assessment of country profiles and conceptual Model itself. This paper presents an overview of immovable property valuation conducted for taxation purposes in Turkey. Based on this overview, it also proposes a country profile of LADM Valuation Information Model in Turkey case. The country profile covers valuation activities for annually levied recurrent property taxes (i.e. Land Tax and Building Tax) in Turkey, characteristics and spatial aspects of valuation units used in property valuation, property valuation approaches employed for property taxation, transaction prices used in valuation procedures, parties involved in valuation practices, and Information on taxes on immovable property. The profile also includes the content of code lists that detail administrative valuations in relation to property tax assessments in Turkey. The proposed profile is evaluated with Unified Modeling Language (UML) instance level diagrams in examples of property taxes on land and building in Turkey for assessing whether the profile fulfills the needs of Information management aspects of valuation activities for property taxation. Towards

Umit Isikdag - One of the best experts on this subject based on the ideXlab platform.

  • Towards the Netherlands LADM Valuation Information Model Country Profile
    2019
    Co-Authors: Abdullah Kara, Ruud Kathmann, Christian Lemmen, Peter Van Oosterom, Umit Isikdag
    Abstract:

    In this paper, an overview of property valuation system and practices in the Netherlands are described within the context of LADM Valuation Information Model. The paper also includes the development of the Netherlands Country Profile of LADM Valuation Information Model. A collaborative research initiative has proposed an international valuation Information Model that extends the ISO 19152:2012 Land Administration Domain Model (LADM) for specifying semantics of valuation registries maintained by public authorities. The proposed Model was created based on the specifications of international standards; literature survey and data acquired from questionnaires responded by the national delegates of FIG Commission 9 and FIG Commission 7. Recently, the Model has been updated according to the outputs of the seventh LADM Workshop, Information gained from personal communications, and the results of previous tests and assessments. It has been decided that the Model should be evaluated with new country profiles and prototype systems. This paper firstly examines the public property valuation system and practices in the Netherlands in terms of property valuation legislation, WOZ-value (the official assessed value), the usage areas of the WOZ-value, valuation approaches, revaluation, indexing and dissemination of the WOZ-values. Secondly, the required data sets for property valuation and their data sources are identified considering the related legislation and the System of Key Registers in the Netherlands. The obtained Information is used to develop the Netherlands Country Profile of the LADM Valuation Information Model. It is noted that the country profile covers transaction prices used in valuation procedures, parties involved in valuation practices, and market analysis Information. It is proved that LADM Valuation Information Model provides a decent basis to represent property valuation system in the Netherlands. The results of the study will be used to evaluate LADM Valuation Information Model and input will be provided to LADM v2.0 revision within ISO TC 211 and OGC.

  • SUPPORTING FISCAL ASPECT of LAND ADMINISTRATION THROUGH a LADM-BASED VALUATION Information Model
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    This paper presents an Information system artifact for the fiscal aspect of land administration, a valuation Information Model for the specification of inventories or databases used in valuation for recurrently levied immovable property taxes. The Information Model is designed as an extension module of ISO 19152:2012 Land Administration Domain Model (LADM), which is an international standard for land administration. LADM Valuation Information Model is supposed to facilitate all stages of immovable property valuation, namely the identification of properties, assessment of properties through single or mass appraisal procedures, generation and representation of sales statistics, and dealing with appeals. Therefore, it enables the recording of data concerning the parties that are involved in valuation practices, property objects that are subject of valuation, their characteristics and other datasets used for and produced within single and mass appraisal procedures. Moreover, it enables development of valuation maps, and property price records needed to assess changes in property values, as addressed by the New Urban Agenda which is as an extension of 2030 Agenda for Sustainable Development for urban areas (cf. Clause 104). The ultimate purpose of this research is to provide governments with a common basis for the development of local or national databases, enable integration of valuation databases with cadastral databases, and guide the private sector in the development of Information technology products.

  • The LADM Valuation Information Model based on INTERLIS
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    The geometric, legal, physical, economic, and environmental characteristics of property units are utilized in valuation activities. Property valuation registries and databases are supposed to record these characteristics in relation to property units that are subject to immovable property valuation. Moreover, the links between valuation registries and the other land administration registries such as cadastre, land registry, building and dwelling should be specified. Apart from procedural valuation standards, there is no internationally accepted data standard that defines the links and semantics of property valuation databases. The ISO 19152:2012 Land Administration Domain Model (LADM), as an international land administration standard focuses on legal requirements, but considers out of scope specifications of external Information systems including valuation and taxation databases. A recently started joint activity under International Federation of Surveyor s (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has developed an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation . This paper investigates the use of INTERLIS tools f or the technical implementation of the Valuation Information Model, which has been develop ed as a valuation extension of ISO 19152:2012 Land Administration Domain Model (LADM). INTERLIS is a Swiss standard that enables Modelling and integration of geographic data sets. It provides a conceptual schema language that can b e used to specify a data Model in a neutral system environment, similarly, class diagrams of th e Unified Modeling Language (UML). It is compatible with international standards like UML , XML and GML. INTERLIS also provide some tools for the implementation of conceptual Models into technical Models. The core LADM, a number of the ISO191xx base Models and some LADM country profiles were already expressed in INTERLIS standard. This paper presents definition of classes, code lists and constraints of the LADM Valuation Information Model and its Turkish Country Profile i n INTERLIS. It also discusses possible advantageous of INTERLIS tools (UML editor, compile r, checker, validator and loader) such as system neutral data exchange format, compatibility with relevant international standards, reusable and extensible conceptual schema language, and automatic translation from the conceptual Model to physical Model.

  • A Database Implementation of LADM Valuation Information Model in Turkish Case Study
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently started joint activity under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The conceptual Model was represented through class diagrams of the Unified Modeling Language (UML). This paper describes the development of a prototype for the implementation of the conceptual Model in terms of a Turkish case study. The main aim of this paper is to assess and improve the proposed conceptual LADM Valuation Information Model. In the development part, the classes, attributes, constraints, cardinalities and relations between classes of the conceptual Model were converted to technical (physical) Model, namely the Oracle Spatial 11g database schema has been generated from the conceptual Model definitions. The conceptual schema definitions were implemented into the database, which next was loaded with sample datasets related to property valuation and taxation in Turkey. The sample data includes valuation units that are the subjects of recurrently levied property taxes in Turkey, such as unimproved urban parcel and parcel and improvements together as condominium property, valuation and taxation Information of the valuation units in different years, and as well as geometries of valuation units. The technical Model of LADM Valuation Information Model Turkish Country Profile has been tested in evaluation phase through SQL queries and visualization tools, respectively. In this phase, it is investigated that whether the both conceptual and technical Models fulfill the needs of Information management aspects of valuation activities for property taxation.

  • Towards Turkish LADM valuation Information Model country profile
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently established joint working group under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started the development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on international standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The planned further works include (i) creating country profiles, and (ii) development of prototypes for the assessment of country profiles and conceptual Model itself. This paper presents an overview of immovable property valuation conducted for taxation purposes in Turkey. Based on this overview, it also proposes a country profile of LADM Valuation Information Model in Turkey case. The country profile covers valuation activities for annually levied recurrent property taxes (i.e. Land Tax and Building Tax) in Turkey, characteristics and spatial aspects of valuation units used in property valuation, property valuation approaches employed for property taxation, transaction prices used in valuation procedures, parties involved in valuation practices, and Information on taxes on immovable property. The profile also includes the content of code lists that detail administrative valuations in relation to property tax assessments in Turkey. The proposed profile is evaluated with Unified Modeling Language (UML) instance level diagrams in examples of property taxes on land and building in Turkey for assessing whether the profile fulfills the needs of Information management aspects of valuation activities for property taxation. Towards

Peter Van Oosterom - One of the best experts on this subject based on the ideXlab platform.

  • Towards the Netherlands LADM Valuation Information Model Country Profile
    2019
    Co-Authors: Abdullah Kara, Ruud Kathmann, Christian Lemmen, Peter Van Oosterom, Umit Isikdag
    Abstract:

    In this paper, an overview of property valuation system and practices in the Netherlands are described within the context of LADM Valuation Information Model. The paper also includes the development of the Netherlands Country Profile of LADM Valuation Information Model. A collaborative research initiative has proposed an international valuation Information Model that extends the ISO 19152:2012 Land Administration Domain Model (LADM) for specifying semantics of valuation registries maintained by public authorities. The proposed Model was created based on the specifications of international standards; literature survey and data acquired from questionnaires responded by the national delegates of FIG Commission 9 and FIG Commission 7. Recently, the Model has been updated according to the outputs of the seventh LADM Workshop, Information gained from personal communications, and the results of previous tests and assessments. It has been decided that the Model should be evaluated with new country profiles and prototype systems. This paper firstly examines the public property valuation system and practices in the Netherlands in terms of property valuation legislation, WOZ-value (the official assessed value), the usage areas of the WOZ-value, valuation approaches, revaluation, indexing and dissemination of the WOZ-values. Secondly, the required data sets for property valuation and their data sources are identified considering the related legislation and the System of Key Registers in the Netherlands. The obtained Information is used to develop the Netherlands Country Profile of the LADM Valuation Information Model. It is noted that the country profile covers transaction prices used in valuation procedures, parties involved in valuation practices, and market analysis Information. It is proved that LADM Valuation Information Model provides a decent basis to represent property valuation system in the Netherlands. The results of the study will be used to evaluate LADM Valuation Information Model and input will be provided to LADM v2.0 revision within ISO TC 211 and OGC.

  • SUPPORTING FISCAL ASPECT of LAND ADMINISTRATION THROUGH a LADM-BASED VALUATION Information Model
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    This paper presents an Information system artifact for the fiscal aspect of land administration, a valuation Information Model for the specification of inventories or databases used in valuation for recurrently levied immovable property taxes. The Information Model is designed as an extension module of ISO 19152:2012 Land Administration Domain Model (LADM), which is an international standard for land administration. LADM Valuation Information Model is supposed to facilitate all stages of immovable property valuation, namely the identification of properties, assessment of properties through single or mass appraisal procedures, generation and representation of sales statistics, and dealing with appeals. Therefore, it enables the recording of data concerning the parties that are involved in valuation practices, property objects that are subject of valuation, their characteristics and other datasets used for and produced within single and mass appraisal procedures. Moreover, it enables development of valuation maps, and property price records needed to assess changes in property values, as addressed by the New Urban Agenda which is as an extension of 2030 Agenda for Sustainable Development for urban areas (cf. Clause 104). The ultimate purpose of this research is to provide governments with a common basis for the development of local or national databases, enable integration of valuation databases with cadastral databases, and guide the private sector in the development of Information technology products.

  • The LADM Valuation Information Model based on INTERLIS
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    The geometric, legal, physical, economic, and environmental characteristics of property units are utilized in valuation activities. Property valuation registries and databases are supposed to record these characteristics in relation to property units that are subject to immovable property valuation. Moreover, the links between valuation registries and the other land administration registries such as cadastre, land registry, building and dwelling should be specified. Apart from procedural valuation standards, there is no internationally accepted data standard that defines the links and semantics of property valuation databases. The ISO 19152:2012 Land Administration Domain Model (LADM), as an international land administration standard focuses on legal requirements, but considers out of scope specifications of external Information systems including valuation and taxation databases. A recently started joint activity under International Federation of Surveyor s (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has developed an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation . This paper investigates the use of INTERLIS tools f or the technical implementation of the Valuation Information Model, which has been develop ed as a valuation extension of ISO 19152:2012 Land Administration Domain Model (LADM). INTERLIS is a Swiss standard that enables Modelling and integration of geographic data sets. It provides a conceptual schema language that can b e used to specify a data Model in a neutral system environment, similarly, class diagrams of th e Unified Modeling Language (UML). It is compatible with international standards like UML , XML and GML. INTERLIS also provide some tools for the implementation of conceptual Models into technical Models. The core LADM, a number of the ISO191xx base Models and some LADM country profiles were already expressed in INTERLIS standard. This paper presents definition of classes, code lists and constraints of the LADM Valuation Information Model and its Turkish Country Profile i n INTERLIS. It also discusses possible advantageous of INTERLIS tools (UML editor, compile r, checker, validator and loader) such as system neutral data exchange format, compatibility with relevant international standards, reusable and extensible conceptual schema language, and automatic translation from the conceptual Model to physical Model.

  • A Database Implementation of LADM Valuation Information Model in Turkish Case Study
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently started joint activity under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The conceptual Model was represented through class diagrams of the Unified Modeling Language (UML). This paper describes the development of a prototype for the implementation of the conceptual Model in terms of a Turkish case study. The main aim of this paper is to assess and improve the proposed conceptual LADM Valuation Information Model. In the development part, the classes, attributes, constraints, cardinalities and relations between classes of the conceptual Model were converted to technical (physical) Model, namely the Oracle Spatial 11g database schema has been generated from the conceptual Model definitions. The conceptual schema definitions were implemented into the database, which next was loaded with sample datasets related to property valuation and taxation in Turkey. The sample data includes valuation units that are the subjects of recurrently levied property taxes in Turkey, such as unimproved urban parcel and parcel and improvements together as condominium property, valuation and taxation Information of the valuation units in different years, and as well as geometries of valuation units. The technical Model of LADM Valuation Information Model Turkish Country Profile has been tested in evaluation phase through SQL queries and visualization tools, respectively. In this phase, it is investigated that whether the both conceptual and technical Models fulfill the needs of Information management aspects of valuation activities for property taxation.

  • Towards Turkish LADM valuation Information Model country profile
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently established joint working group under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started the development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on international standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The planned further works include (i) creating country profiles, and (ii) development of prototypes for the assessment of country profiles and conceptual Model itself. This paper presents an overview of immovable property valuation conducted for taxation purposes in Turkey. Based on this overview, it also proposes a country profile of LADM Valuation Information Model in Turkey case. The country profile covers valuation activities for annually levied recurrent property taxes (i.e. Land Tax and Building Tax) in Turkey, characteristics and spatial aspects of valuation units used in property valuation, property valuation approaches employed for property taxation, transaction prices used in valuation procedures, parties involved in valuation practices, and Information on taxes on immovable property. The profile also includes the content of code lists that detail administrative valuations in relation to property tax assessments in Turkey. The proposed profile is evaluated with Unified Modeling Language (UML) instance level diagrams in examples of property taxes on land and building in Turkey for assessing whether the profile fulfills the needs of Information management aspects of valuation activities for property taxation. Towards

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  • Towards the Netherlands LADM Valuation Information Model Country Profile
    2019
    Co-Authors: Abdullah Kara, Ruud Kathmann, Christian Lemmen, Peter Van Oosterom, Umit Isikdag
    Abstract:

    In this paper, an overview of property valuation system and practices in the Netherlands are described within the context of LADM Valuation Information Model. The paper also includes the development of the Netherlands Country Profile of LADM Valuation Information Model. A collaborative research initiative has proposed an international valuation Information Model that extends the ISO 19152:2012 Land Administration Domain Model (LADM) for specifying semantics of valuation registries maintained by public authorities. The proposed Model was created based on the specifications of international standards; literature survey and data acquired from questionnaires responded by the national delegates of FIG Commission 9 and FIG Commission 7. Recently, the Model has been updated according to the outputs of the seventh LADM Workshop, Information gained from personal communications, and the results of previous tests and assessments. It has been decided that the Model should be evaluated with new country profiles and prototype systems. This paper firstly examines the public property valuation system and practices in the Netherlands in terms of property valuation legislation, WOZ-value (the official assessed value), the usage areas of the WOZ-value, valuation approaches, revaluation, indexing and dissemination of the WOZ-values. Secondly, the required data sets for property valuation and their data sources are identified considering the related legislation and the System of Key Registers in the Netherlands. The obtained Information is used to develop the Netherlands Country Profile of the LADM Valuation Information Model. It is noted that the country profile covers transaction prices used in valuation procedures, parties involved in valuation practices, and market analysis Information. It is proved that LADM Valuation Information Model provides a decent basis to represent property valuation system in the Netherlands. The results of the study will be used to evaluate LADM Valuation Information Model and input will be provided to LADM v2.0 revision within ISO TC 211 and OGC.

  • SUPPORTING FISCAL ASPECT of LAND ADMINISTRATION THROUGH a LADM-BASED VALUATION Information Model
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    This paper presents an Information system artifact for the fiscal aspect of land administration, a valuation Information Model for the specification of inventories or databases used in valuation for recurrently levied immovable property taxes. The Information Model is designed as an extension module of ISO 19152:2012 Land Administration Domain Model (LADM), which is an international standard for land administration. LADM Valuation Information Model is supposed to facilitate all stages of immovable property valuation, namely the identification of properties, assessment of properties through single or mass appraisal procedures, generation and representation of sales statistics, and dealing with appeals. Therefore, it enables the recording of data concerning the parties that are involved in valuation practices, property objects that are subject of valuation, their characteristics and other datasets used for and produced within single and mass appraisal procedures. Moreover, it enables development of valuation maps, and property price records needed to assess changes in property values, as addressed by the New Urban Agenda which is as an extension of 2030 Agenda for Sustainable Development for urban areas (cf. Clause 104). The ultimate purpose of this research is to provide governments with a common basis for the development of local or national databases, enable integration of valuation databases with cadastral databases, and guide the private sector in the development of Information technology products.

  • The LADM Valuation Information Model based on INTERLIS
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    The geometric, legal, physical, economic, and environmental characteristics of property units are utilized in valuation activities. Property valuation registries and databases are supposed to record these characteristics in relation to property units that are subject to immovable property valuation. Moreover, the links between valuation registries and the other land administration registries such as cadastre, land registry, building and dwelling should be specified. Apart from procedural valuation standards, there is no internationally accepted data standard that defines the links and semantics of property valuation databases. The ISO 19152:2012 Land Administration Domain Model (LADM), as an international land administration standard focuses on legal requirements, but considers out of scope specifications of external Information systems including valuation and taxation databases. A recently started joint activity under International Federation of Surveyor s (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has developed an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation . This paper investigates the use of INTERLIS tools f or the technical implementation of the Valuation Information Model, which has been develop ed as a valuation extension of ISO 19152:2012 Land Administration Domain Model (LADM). INTERLIS is a Swiss standard that enables Modelling and integration of geographic data sets. It provides a conceptual schema language that can b e used to specify a data Model in a neutral system environment, similarly, class diagrams of th e Unified Modeling Language (UML). It is compatible with international standards like UML , XML and GML. INTERLIS also provide some tools for the implementation of conceptual Models into technical Models. The core LADM, a number of the ISO191xx base Models and some LADM country profiles were already expressed in INTERLIS standard. This paper presents definition of classes, code lists and constraints of the LADM Valuation Information Model and its Turkish Country Profile i n INTERLIS. It also discusses possible advantageous of INTERLIS tools (UML editor, compile r, checker, validator and loader) such as system neutral data exchange format, compatibility with relevant international standards, reusable and extensible conceptual schema language, and automatic translation from the conceptual Model to physical Model.

  • A Database Implementation of LADM Valuation Information Model in Turkish Case Study
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently started joint activity under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The conceptual Model was represented through class diagrams of the Unified Modeling Language (UML). This paper describes the development of a prototype for the implementation of the conceptual Model in terms of a Turkish case study. The main aim of this paper is to assess and improve the proposed conceptual LADM Valuation Information Model. In the development part, the classes, attributes, constraints, cardinalities and relations between classes of the conceptual Model were converted to technical (physical) Model, namely the Oracle Spatial 11g database schema has been generated from the conceptual Model definitions. The conceptual schema definitions were implemented into the database, which next was loaded with sample datasets related to property valuation and taxation in Turkey. The sample data includes valuation units that are the subjects of recurrently levied property taxes in Turkey, such as unimproved urban parcel and parcel and improvements together as condominium property, valuation and taxation Information of the valuation units in different years, and as well as geometries of valuation units. The technical Model of LADM Valuation Information Model Turkish Country Profile has been tested in evaluation phase through SQL queries and visualization tools, respectively. In this phase, it is investigated that whether the both conceptual and technical Models fulfill the needs of Information management aspects of valuation activities for property taxation.

  • Towards Turkish LADM valuation Information Model country profile
    2018
    Co-Authors: Abdullah Kara, Volkan Çağdaş, Christian Lemmen, Peter Van Oosterom, Umit Isikdag, Erik Stubkjær
    Abstract:

    A recently established joint working group under International Federation of Surveyors (FIG) Commission 9 (Valuation and the Management of Real Estate) and FIG Commission 7 (Cadastre and Land Management) has started the development of an Information Model for the specification of valuation Information maintained by public authorities especially for property taxation. In this initiative, ISO 19152:2012 Land Administration Domain Model (LADM) has been taken as the basis for the development of a Valuation Information Model. A first version of the LADM Valuation Information Model was created based on international standards, literature survey and data gained from questionnaires replied by the national delegates of FIG Commission 9 and FIG Commission 7. The planned further works include (i) creating country profiles, and (ii) development of prototypes for the assessment of country profiles and conceptual Model itself. This paper presents an overview of immovable property valuation conducted for taxation purposes in Turkey. Based on this overview, it also proposes a country profile of LADM Valuation Information Model in Turkey case. The country profile covers valuation activities for annually levied recurrent property taxes (i.e. Land Tax and Building Tax) in Turkey, characteristics and spatial aspects of valuation units used in property valuation, property valuation approaches employed for property taxation, transaction prices used in valuation procedures, parties involved in valuation practices, and Information on taxes on immovable property. The profile also includes the content of code lists that detail administrative valuations in relation to property tax assessments in Turkey. The proposed profile is evaluated with Unified Modeling Language (UML) instance level diagrams in examples of property taxes on land and building in Turkey for assessing whether the profile fulfills the needs of Information management aspects of valuation activities for property taxation. Towards

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