Further developments of the implementation of the ALKIS-ATKIS model using the International Standards A status report

Workshop on standards in action2 Presentation l by Erhard Pross, Leipzig l with contributions from –Markus Seifert, Munich –Clemens Portele, Bonn –Claus-Dietrich Werner, Hannover –Elmar Happ, Bonn

Workshop on standards in action3 Overview l short introduction to ALKIS-ATKIS application of ISO Encoding Rules in ALKIS l implementing a standards-based Spatial Data Infrastructure for state governments in Germany l final remarks

Workshop on standards in action4 Introduction (I) - Abbreviations l ALB Automated Real Estate Register l ALK Automated Real Estate Map l ALKIS® Authoratative Real Estate Cadastre Information System (Integration of ALB and ALK) l ATKIS ® Authoratative Topographic-Cartographic Information System l NAS standardized data interface

Workshop on standards in action5 Introduction (II) cadastre information scale 1: :2000 topographic information scale 1: :1 Mio ALBALK ATKIS new integrated ALKIS-ATKIS model

Workshop on standards in action6 ALK: Automated Real Estate Map l standardized data interface (NAS) ALK ALK coloured Trees Enviroment Sewers Graphics Courtesy of LVermA NRW

Workshop on standards in action7 ALKIS l official Cadastre Information System l supported by all federal states l integration of ALK & ALB l object-oriented data model l specifications available to GIS vendors l based on ISO Standards

Workshop on standards in action8 ALKIS-ATKIS reference model NASTIFF,DXF,... user ALKIS-ATKIS catalogues digital image model maps, other data TIFF ATKIS- DLM ALKIS data ATKIS- DTK dig. ALKIS data nondig. ALKIS data topographic map describes regulates presented in distributed to

Workshop on standards in action9 ALKIS-ATKIS package in the ISO model

Workshop on standards in action10 Overview (II) l short introduction to ALKIS-ATKIS application of ISO Encoding Rules in ALKIS l implementing a standards-based Spatial Data Infrastructure for state governments in Germany l final remarks

Workshop on standards in action11 ALKIS-NAS: Starting Point – – – – ALKIS Application Schema (UML) ? ? GML ? NAS (XML-Schema) NAS (XML-Schema) Feature Catalogue (XML) Feature Catalogue (XML) Feature Catalogue (HTML, RTF) Feature Catalogue (HTML, RTF)

Workshop on standards in action12 Challenges (I) l avoid consequences on the technical UML application schema l a data interface structured as simple as possible is of fundamental importance for the acceptance of ALKIS by potential users l NAS should avoid unnecessary complexity not to build up an unnecessary barrier for the use of geographic data in Germany

Workshop on standards in action13 Challenges (II) l NAS should be based on international accepted basic standards as far as possible l there is the urgent need to examine the encoding rules at concrete instances before establishing the NAS l the requests for an update mechanism have to be taken into account

Workshop on standards in action14 ISO 19118: Current Situation Problems are identified by the application of ISO XML encoding rules within the specification of NAS: –still a draft standard –parallel development at OGC - GML Both developments are not coordinated (first attemps are recognized, but a complete harmonization is probably not expectable)  GML and ISO XML Encoding Rules are not compatible –No standardized XML-schemas are available for the ISO basic schemas  Loss of interoperability

Workshop on standards in action15 GML: Current Situation There are also problems with GML: l no exactly defined references to ISO draft standards l no update mechanism l topology is not supported by GML 2.0 l no support of splines and arcs

Workshop on standards in action16 Strategy of Germany (I) l use of ISO Level 1 in ALKIS  ISO compliant documentation of „NAS Encoding Rules“, which maps the conceptual ALKIS data model to a GML-2.0 application schema (in future GML 3.0)  NAS Encoding Rules are defined as simple as possible and largely compliant to ISO XML Encoding Rules l support the beginning harmonization between ISO XML Encoding Rules and GML  Objective: ISO Level 2 conformity for ALKIS-NAS

Workshop on standards in action17 Strategy of Germany (II) Additional geometrical specifications: l arcs and splines l definition of a GML 2.0 compliant extension mechanism l objective  use of GML 3.0 elements –consider existing GML 3.0 drafts (arcs) –otherwise using ISO geometrical elements (splines, surfaces)

Workshop on standards in action18 Strategy of Germany (III) – – – – ALKIS Application Schema (UML) NAS (XML-Schema) NAS (XML-Schema) Feature Catalogue (XML) Feature Catalogue (XML) Feature Catalogue (HTML, RTF) Feature Catalogue (HTML, RTF) Level 1 GML 2.0

Workshop on standards in action19 Overview (III) l short introduction to ALKIS-ATKIS application of ISO Encoding Rules in ALKIS l implementing a standards-based Spatial Data Infrastructure for state governments in Germany l final remarks

Workshop on standards in action20 GEOBASIS.NRW & GDI NRW GEOBASIS.NRW - Basic geodata l adaptation of ALKIS specification to the needs of Nordrhein-Westfalen (NRW) l project to assist state government in the implementation of ALKIS GDI NRW - Enhance the using of geoinformation l Geographic Data Infrastructure for the state of Nordrhein-Westfalen l project to assist the creation of interoperable solutions

Workshop on standards in action21 GDI NRW GEOBASIS.NRW Product A Product B Product C Departments, Public IS,... Local GeoDataServer Geodata "Bus" NRW GeoDataServer NRW Local Geodata "Bus"

Workshop on standards in action22 First Phase l from July 1999 to December 2000 l first prototype shown at –InterGEO 2000 Berlin, September 2000 –CeBIT 2001 Hannover, March 2001 l Implementation of an AEDIDB Extension for OGC Simple Features  Enabling interoperability for ‚legacy‘ systems Oracle 8i / Informix IDS 2000 Geodata Server AEDIDB OGC - Simple Features ALK-GIAP AEDDesktop AIS Other Clients

Workshop on standards in action23 Second Phase l from January 2001 to December 2002 l implementation of a prototype for editing ALKIS l shown at –InterGEO 2001 Cologne, September 2001 l implementation of a web-based client  Next generation of cadastral software based on ArcGIS

Workshop on standards in action24 Overview (IV) l short introduction to ALKIS-ATKIS application of ISO Encoding Rules in ALKIS l implementing a standards-based Spatial Data Infrastructure for state governments in Germany l final remarks

Workshop on standards in action25 Final remarks l Germany‘s GI community uses standard based modelling l using both ISO standards and OGC specifications l hope for a nearly perfect cooperation l presenting further results next year in Bangkok