Abstrakt
The contribution acquaints with the Czech portals that make cartographic heritage accessible in its entirety. According to the research conducted by the author there were digitized about 400,000 cartographic materials at the end of 2016 and 300,000 of them were made accessible.
The level and unification of metadata corre-sponds to subsequent possibilities of search. Thematic portals work with special thematic subject groups.
Most of the institutions make accessible georeferenced documents on current or historical basemaps or they export them to the portal Staremapy.cz for collaborative processing. Images quality and loading are improving and depend on the technical possibilities of the researcher.
Older digitats migrate to newer formats. Collections allow image zooming, possibly for 3D documents (globes, models) their rotation or unrolling into the plane.
Most of the images are protected with watermarks. The direct download or saving of the whole image is not mostly supported.
Researcher must contact the owner to be able to use the work. There are also other services such as working with map series, searching by map symbols, personal licence portals of cartographers, e-learning for the work with old maps, georeferencing for researchers, detection of cartographic projection etc.
Metadata with links are aggregated into higher national and international wholes including Europeana.