ABSTRACT
This chapter draws attention to the problems of semantic integration of land use/cover data in two transborder projects in the Oder River Basin and in the Carpathians. It uses historical maps of the entire area of Poland to retrospectively analyze Land Use/Land Cover (LULC) changes in transborder terrains. The past 100 years in Poland have a long history of cartographical attempts to present different forms of LULC for the entire country. Characterized resources vary thematically as well as in the minimal mapping unit (MMU) size and classification model. Besides varying source data, all of these resources also vary in MMU, and scale and number of LULC classes. The Polish Topographic Database maintained by the Head Office of Geodesy and Cartography, was initiated in 2003 and finally completed in 2013.
