With the product TopPlusOpen, the BKG breaks new grounds and creates for the first time a consistent web map, completely based on free or open data sources. For this purpose, the BKG merged, processed and combined many different data sources in order to achieve the best possible map presentation.
The web map TopPlusOpen has 18 predefined levels of detail – from the worldwide overview map to the detailed city map in Germany. As standard, the product is available in the widespread Web Mercator Projection (EPSG:3857). Via the WMS interface, the web map may also be called in further common projections.
The web map is divided into three different display areas:
World (small scale)
Europe (medium scale)
Germany and neighbouring countries (large scale)
Additionally, the TopPlusOpen contains high-resolution Presentation graphics. Thus for the first time free and graphically uniform map data are available with full coverage for the territory of the Federal Republic of Germany and the adjacent areas of neighbouring countries in the scales 1 : 25,000 and 1 : 50,000, that are optimally suited for printing.
At present, no further maps are available in the service beyond the mentioned display areas.
Especially, each user has to place the source reference to all geodata, metadata and geodata services recognisably and optically linked. Alterations, processings, new designs or other adaptations have to be affixed with an indication of the alteration in the source reference.
Source reference and indication of alteration have to be formulated as follows. The source reference has to be linked with the URL "http://www.bkg.bund.de" for the representation at a website. Furthermore, the linking of the word “Data sources” is authorized with the following URL: http://sg.geodatenzentrum.de/web_public/Datenquellen_TopPlus_Open.pdf.