Application of the EGDI Metadata Catalogue is the central access point to search information (metadata) about data sources that are maintained and provided by the European Geological Surveys. It is based on MIcKA system, v. 6, which enables the user to work with metadata of spatial data in accordance with international standards (ISO, OGC and INSPIRE). Metadata are administered centrally in a database, edited and viewed through a web interface, and published by means of a standardized catalogue service (CS-W).