Land Cover dataset is a perfect source for supervised classification exercise. These data is manually digitized based on orthophoto as well as other sources. Each part of the land is checked at least once every three years. The temporal coverage is from January 2015, with new updates added every quarter (historical data are included as well).

The data are in vector format (SHP), polygons with land cover class attribute, D96/TM coordinate system. Source: Ministry of Agriculture, Forestry and Food of Republic of Slovenia

Technical documentation is available here .
Sample file (10x10 km, latest data) is available here .

Data covers the following land cover classes:
-Arable land
-Hopfield
-Permanent plants on arable land
-Greenhouse
-Vineyard
-Beehouse
-Intensive orchard
-Extensive or grass orchard
-Olive field
-Other permanent crops
-Permanent grassland
-Meadow grassland
-Agricultural land in overgrowth
-Plantation of forest trees
-Trees and shrubs
-Untreated agricultural land
-Agricultural land, growing with forest trees
-Forest
-Built-up and similar land
-Meadow
-Wet lands
-Other wet lands
-Dry open land with a special plant cover
-Open land without or with insignificant plant cover
-Water