SOZO AND HYDRO THEMATIC DATABASES AS A COMPONENT OF NSDI IN POLAND

J. Bac-Bronowicz1, R. Olszewski2, T. Berus3, A. Kolodziej4

1 - Institute of Geodesy and Photogrammetry, Wroclaw Academy of Agriculture, Poland

2 - Institute of Photogrammetry and Cartography, Warsaw University of Technology, Poland

3 - Poznan

4 - Warszawa

r.olszewski@gik.pw.edu.pl

 

Within the research and implementation Project No 6 T 12 2005C/06552 Methods and procedures of integration, visualization, generalization and standardization of state geodesic and cartographic resources data bases and their usage in creating thematic data bases, commissioned by the Ministry of Science and the Head Office of Geodesy and Cartography, a concept of a multi-resolution reference database has been developed as a key element of NSDI in Poland (J. Bac-Bronowicz, D. Gotlib, R. Olszewski, 2007). The objective of this Project is not only to propose rules of development of the multi-resolution reference topographic database for the entire country, but also to create a platform, integrating the official registers of spatial data and thematic databases. Therefeore, the multi-resolution topographic database should be designed in such a way that it could become the basis for official thematic works.

The official thematic databases are created in Poland by three institutions: the Head Office of Geodesy and Cartography (GUGiK), the State Geological Institute (PIG) and the Institute of Meteorology and Water Management (IMiGW). Creation of the NSDI in Poland requires utilisation of the state reference systems as the source of topographic data for thematic works (R. Olszewski, M. Sikorska-Maykowska, 2005; R. Graf, A. Kaniecki, R. Olszewski, S. Żynda, 2005). This requirement is met by the sozological and hydrographic databases only, commissioned by the Head Office of Geodesy and Cartography. At present, hydrographic (HYDRO) and sozological (SOZO) databases are based on topographic data acquired from the technological cycle VMap L2 of the first edition. Significant changes have been introduced to the conceptual model of the VMap L2 database of the new edition, which has been presently developed; those changes are related to harmonisation of two databases, which are developed in Poland: the TBD and VMap L2 databases (D. Gotlib, A. Iwaniak, R. Olszewski, 2005; 2006).

The VMap L2 database of the second edition is currently developed for the area of several dozens of 1:50 000 topographic map sheets however, it is to be completed for the entire country within several years. This database will become the basic source of topographic reference data for derivative works. Considering the development of a coherent concept of the spatial data infrastructure in Poland, the authors proposed modification of the conceptual model of the databases of sozological and hydrographic maps, which would cover the utilisation of the VMap L2 database of the new edition as reference data. Such solution will allow to utilise updated and reliable topographic data on the sozological and hydrographic map, as well as to simplify the process of integration of the SOZO and HYDRO databases with other thematic datases, which are also developed on the background of the new edition of the VMap L2 database.

The paper will discuss the most important proposals of substantial and technological modifications of the SOZO and HYDRO databases:

         Automation of the process of supplying the SOZO and HYDRO databases with data from the VMap L2 database of the second edition,

         Introduction of topological relations between feature classes,

         Resignation from geometric component elements within a given object class,

         Integration of layers of similar logical characteristics in order to maintain natural relations existing in the natural environment,

         Development of dictionary of special values,

         Indexing selected attributes.

 

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