High Resolution Layers (HRL) are raster data with 10m (20m for change layer) and 100 m spatial resolution, which are part of the Copernicus Land Monitoring Service. The product contains 2 data sets: Grassland that contains classified Grassland layer (GRA) and Grassland Change (GRAC). Data is created by semi-automatic procedures over satellite imagery every 3 years. You can find technical specifications here: https://land.copernicus.eu/user-corner/technical-library/hrl-grassland-technical-document-prod-2015/view, information on the program at http://land.copernicus.eu.

High Resolution Layers are created as part of the Copernicus Land Monitoring Service every 3 years. This is a cut layers of the Czech Republic in the coordinate system S-JTSK (EPSG:5514) for better access services Czech users. Data generation was funded by the European Union. Data was produced with funding by the European Union. Copyright Copernicus Programme.