Summary:

In Poland national geoinformation system is built at the three levels: central, regional and local. The system levels differs in range of description and detail of data. The local (county) level spatial information system databases are the most detailed. The digital development and the current legislation (Law on spatial information infrastructure) make the expansion of official Internet site accessing various thematic maps. This paper presents proposals for an overall assessment of geoportals created at the local level (county). Methodology for assessing the overall based on three criteria: transparency, functionality and content available. Category transparency are attributes of evaluation defining the effort it takes an organization to share information through its Web site. The functional category defining attributes of assessing the ease with which users can obtain information on one page. Rating the content is quantitative verification of spatial data contained in the portal of the three thematic groups of the Act on infrastructure.
The proposed method of assessing the valuation performed spatial data quality in 29 counties located throughout the country. As a result of research work, it was found that the overall assessment web geoportals is satisfactory. Each of the sites got more than half the maximum number of points.