The offered geo-data's are subject to a constant quality control. The geo-data's of the individual countries base on raw data from there authorities and institutions.
The quality of the raw data depends therefore on the infrastructure of the respective country and there possibilities. Geo data of highly industrial nations therefore have higher quality than those of developing countries.
We point out expressly that the data were prepared and computed of best knowledge from the raw data of the respective countries and the state-specific suppliers.