Depending on where you downloaded it, the archive usually contains one of the following:

: Raw geospatial features like roads, buildings, and points of interest (POIs) in formats like .osm (XML), .shp (Shapefile), or .geojson .

: ASCII text files containing lists of coordinates (latitude and longitude) that can be imported into software like QGIS.

The file is a compressed archive that typically contains geospatial data from OpenStreetMap (OSM) . Likely Contents

: Pre-processed map images (e.g., gmapsupp.img ) specifically formatted for loading onto GPS devices.

Since .7z is a high-compression format, you will need a third-party tool to extract it:

: Data structured for web maps or self-hosting, often following schemas like OpenMapTiles. How to Access the Content