Protected areas of different types in Poland digitized from different
map sources and enriched with the information gained from the Ministry of
Environmental Protection, Natural Resources and Forestry ...
Four-level hydrographic division of Poland prepared in accordance to a
new scheme of catchment division elaborated by the Institute of
Meteorology and Water Management (IMGW). Scanned from the
Land use map of Poland acquisited form interpreted Landsat TM, MSS
images by digitization. 24 classes of land use grouped in subjects
(agriculture, grass lands, settlements and communication areas, ...