I discovered by trial and error that
.map and .mbtiles would work.
The mapzen file formats had some .xml and .dbf files
so I thought they might work also.
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Show posts Menuyou can find more info in the manual -> oruxmaps.comQuote
OruxMaps uses a proprietary map format map...Quote
...
A map is a folder with the name of the map which contains:
Always: a file with the extension .otrk2.xml with calibration data.
A file with the extension .db or a series of folders with map images.
format contains
osm pbf hong-kong_china.osm.bin
osm xml hong-kong_china.osm
osm2pgsql shp hong-kong_china_osm_line.dbf
hong-kong_china_osm_line.shp
etc
osm2pgsql json hong-kong_china_osm_line.geojson
hong-kong_china_osm_point.geojson
hong-kong_china_osm_polygon.geojson
imposm shp hong-kong_china_osm_admin.dbf
hong-kong_china_osm_admin.shp
etc
imposm geojson hong-kong_china_admin.geojson
etc
oruxmaps/preferences