Geodetska uprava Republike Slovenije
GURS is the Slovenia's official geodetic authority under Ministry of the Environment and spatial planning. Generally, its Geodetic data (Public information of the Republic of Slovenia) is available under Creative Commons 4.0 attribution (CC-BY) license. GURS kindly & explicitly permitted (email response copy pasted in the OSM forum thread) the OpenStreetMap community to import all those datasets into OpenStreetMap database, from where they can be further distributed without such limitations, under OpenStreetMap License. Wherever possible (depending on media) the attribution should be "Javne informacije Slovenije, Geodetska uprava Republike Slovenije, {dataset name}, stanje {dataset year}" with a link to: http://www.gu.gov.si
Data sets
Data is tagged with these tags:
- Specific per data set:
- source:date=2018-02-28 - to determine source data age for possible updates (on ways only)
- source:year=2008 - to determine source data age for possible updates (on ways only)
Country border
Državna meja Republike Slovenije - http://prostor.gov.si/vstop/index.php?id=425
got permission for import, 45k nodes, 1 way, imported, being reviewed
All parts of the border are grouped as members of relation 218657
218657
Občine (Municipalities / Communes)
Already imported, along with statistical regions - see WikiProject_Slovenia/Regije
House numbers
Source being evaluated, import in planning phase, see Slovenia Address Import.
Building outlines
Slippy map (http://wms.openstreetmap.de/slippymap/GURS-building-outlines ) is available as an imagery overlay in JOSM (menu: Imagery > GURS: Building outlines) and in ID editor (layers button).
Shapefile available at http://egp.gu.gov.si
Some are already imported into OSM by user 
fredi_alf (on osm, edits, contrib, heatmap, chngset com.)
Roads
Not good enough for importing into OSM (low coverage, topological problems) but can be used as a reference in some places.
Shapefile available at http://egp.gu.gov.si
Slippy map (http://wms.openstreetmap.de/slippymap/GURS-road-lines ) is available as an imagery overlay in JOSM (menu: Imagery > GURS: Road lines) and in ID editor (layers button).
National Topographic Model
Not suitable for directly importing into OSM (many conflicts, topological problems) but can be used as a reference in some places.
Available at http://egp.gu.gov.si
Imagery underlay available in JOSM (menu: Imagery > GURS: DOF050 ... (WMTS))
External links
- OSM Forum discussion thread: https://forum.openstreetmap.org/viewtopic.php?id=56034
- http://www.gu.gov.si - home page
- http://egp.gu.gov.si - source for data download
- General terms and conditions (Slovenian version)