6.2 German standard-based systems for eadastral and topographie information
215
ensure consistency across the UML model. Using this approach, which can be
charaterized as Model Driven Architecture (MDA), application schemata could make
use of all predefined data types, types and features existing in the Harmonized UML
Model deploying them as base classes for generalization / specialisation relationships as weil as for typing roles in associations and aggregations or attributes and
operation parameters in respective cadastral application feature classes.
Since AFIS-ALKIS-ATKIS is envisioned by German AdV as an integration platform for other geospatial applications related to the cadastral and topographie application domain a AFIS-ALKIS-ATKIS Base Schema was factored out to be potentially reused in application schemata other then AFIS-ALKIS-ATKIS.
Representation of geometrie and topological properties of feature classes in AFISALKIS-ATKIS is completely based on ISO 19111 (Spatial referencing by coordinates) and ISO 19107 (Spatial schema) using also its informative Simple Topology
examples which show the integration of geometrie and topologie al properties within
one application feature class, allowing for easier implementation based on existing
GIS base products. AFIS-ALKIS-ATKIS is actually using of profile ofISO 19107
(Spatial schema) restricting the variety of possible geometrie and topologie al representations for features and introducing a new kind of topological theme where only
border lines offeatures with surface geometry take part in a topologie al complex.
Metadata used to describe quality aspects of single features and feature sets, respectively as weil as metadata for organizational aspects of geodata capturing, management, and distribution are modelled based on ISO 19115 (Metadata) and its extension methodology.
Catalogues defining the semanties, constraints and structural and behavioural aspects of feature types are generated for AFIS, ALKIS, and ATKIS application schemata according to ISO 1911 0 (Methodology for feature cataloguing). AFIS-ALKISATKIS base schema extends the 19110 part of ISO/TC211 Harmonized UML Model
and XML encoded feature catalogues are generated from the AFIS-ALKIS-ATKIS
UML model and its associated documentation.
To bridge the gap between AFIS-ALKIS-ATKIS base and application schemata
deploying ISO 19100 series standards captured in ISO/TC211 Harmonized UML
Model, which abstract from implementation aspects, and requirements for specifications aimed at interoperability of AFIS-ALKIS-ATKIS implementations based on
GIS products the use of ISO 19118 (Encoding) is of critical importance. A set of encoding rules have been defined to derive XML Schema Definitions for AFISALKIS-ATKIS base and application schemata as weil as ISO 19100 standards from
respective UML models, following a Model Driven Architecture (MDA) approach.
Since interoperability of AFIS-ALKIS-ATKIS COTS implementations is essential to build up viable geodata infrastructures e.g. in the German state ofNorth Rhine
Westphalia (GD! NRW) AdV decided to incorporate Open GIS Consortium (OGC)
Implementation Specifications i.e. Geography Markup Language 3.0 (GML), Web
Feature Server (WFS), and Filter Encoding into its Standard-based data exchange interface (NAS). NAS consists of a set of weil defined operations encoded as XML
Schema Definitions for matching request and response pairs. XML Schema Definitions for WFS, Filter Encoding, GML 3.0, and AFIS-ALKIS-ATKIS base and application schema based on GML 3.0 are incorporated in NAS.
215
ensure consistency across the UML model. Using this approach, which can be
charaterized as Model Driven Architecture (MDA), application schemata could make
use of all predefined data types, types and features existing in the Harmonized UML
Model deploying them as base classes for generalization / specialisation relationships as weil as for typing roles in associations and aggregations or attributes and
operation parameters in respective cadastral application feature classes.
Since AFIS-ALKIS-ATKIS is envisioned by German AdV as an integration platform for other geospatial applications related to the cadastral and topographie application domain a AFIS-ALKIS-ATKIS Base Schema was factored out to be potentially reused in application schemata other then AFIS-ALKIS-ATKIS.
Representation of geometrie and topological properties of feature classes in AFISALKIS-ATKIS is completely based on ISO 19111 (Spatial referencing by coordinates) and ISO 19107 (Spatial schema) using also its informative Simple Topology
examples which show the integration of geometrie and topologie al properties within
one application feature class, allowing for easier implementation based on existing
GIS base products. AFIS-ALKIS-ATKIS is actually using of profile ofISO 19107
(Spatial schema) restricting the variety of possible geometrie and topologie al representations for features and introducing a new kind of topological theme where only
border lines offeatures with surface geometry take part in a topologie al complex.
Metadata used to describe quality aspects of single features and feature sets, respectively as weil as metadata for organizational aspects of geodata capturing, management, and distribution are modelled based on ISO 19115 (Metadata) and its extension methodology.
Catalogues defining the semanties, constraints and structural and behavioural aspects of feature types are generated for AFIS, ALKIS, and ATKIS application schemata according to ISO 1911 0 (Methodology for feature cataloguing). AFIS-ALKISATKIS base schema extends the 19110 part of ISO/TC211 Harmonized UML Model
and XML encoded feature catalogues are generated from the AFIS-ALKIS-ATKIS
UML model and its associated documentation.
To bridge the gap between AFIS-ALKIS-ATKIS base and application schemata
deploying ISO 19100 series standards captured in ISO/TC211 Harmonized UML
Model, which abstract from implementation aspects, and requirements for specifications aimed at interoperability of AFIS-ALKIS-ATKIS implementations based on
GIS products the use of ISO 19118 (Encoding) is of critical importance. A set of encoding rules have been defined to derive XML Schema Definitions for AFISALKIS-ATKIS base and application schemata as weil as ISO 19100 standards from
respective UML models, following a Model Driven Architecture (MDA) approach.
Since interoperability of AFIS-ALKIS-ATKIS COTS implementations is essential to build up viable geodata infrastructures e.g. in the German state ofNorth Rhine
Westphalia (GD! NRW) AdV decided to incorporate Open GIS Consortium (OGC)
Implementation Specifications i.e. Geography Markup Language 3.0 (GML), Web
Feature Server (WFS), and Filter Encoding into its Standard-based data exchange interface (NAS). NAS consists of a set of weil defined operations encoded as XML
Schema Definitions for matching request and response pairs. XML Schema Definitions for WFS, Filter Encoding, GML 3.0, and AFIS-ALKIS-ATKIS base and application schema based on GML 3.0 are incorporated in NAS.