--reverseto reverse the axis (swap x and y) before performing the reprojection reproject can be used together with for examplewellknownandgeojsonio-cli: $ echo "POINT(319180 6399862)" | wellknown | reproject --crs-defs=crs-defs.json --from=EPSG:3006 --to=EPSG:4326 | geojsonio ...
mapExtentis critical option. Usually your data would would be inWGS84(World Geodetic System) and unit as degree decimal for latitudes and longitude. Spatial reference system code for this is "EPSG:4326". To show the geographic data on two dimensional plane (paper or HTML page) the coordinates...