The digital virtually seamless orthophoto of the Czech Republic in 8-bit colour. The pixel of the Orthophoto CR raster image represents 0.125 m of terrain in the mean terrain plane. The positional accuracy of the Orthophoto CR, expressed as the total root mean square error, has shown long-term improvement. Since 2021, the total root mean square error of the Orthophoto CR has stabilised in the range of approximately 0.18–0.20 m (see the Technical Report on the Orthophoto CR). The Orthophoto CR is distributed in the JPEG raster format in distribution units covering 2.5 × 2 km of terrain in the SM 5 map sheet layout. The data files are provided in JPEG format accompanied by world files (JGW) for the S-JTSK, ETRS89-TM33N, and ETRS89-TM34N coordinate systems. Files are provided in compressed format (ZIP).
The Orthophoto of the Czech Republic is exploited in the branch of Ministry of Agriculture as a background for evaluation of fundamental production units in the LPIS system, in the branches of ČÚZK and Ministry of Defence it serves also as a fundamental background for topographic data database update and consequently for update of state map series. The Orthophoto of the Czech Republic is provided to many other users and above all it is intended for state administration bodies and organisations and local governments where is exploited for planning and project preparation, in nature protection, risk management and many others.
Czech Office for Surveying, Mapping and Cadastre
Koukalová, Blanka, Ing.
Pod sídlištěm 1800/9,
Praha 8,
182 11,
Česká republika
Production of orthophotos of the Czech Republic from original aerial survey photos. Since 2012 one half of the state territory is carried out to digitally raster electronic record in the BW-PANCHRO, R, G, B, NIR, they are made of colored images, or can be made in black and white or images in false colors (color infrared).