The geojson is generated by ODM, but I find something wrong about polygon-value.
The range of coordinates(from wikipedia):
- The X axis passing through extending from 180 degrees longitude at the Equator (negative) to 0 degrees longitude (prime meridian) at the Equator (positive)
- The Y axis passing through extending from 90 degrees west longitude at the Equator (negative) to 90 degrees east longitude at the Equator (positive)
How can I get the correct coordinates?
GeoJSON spec has been extended to non-angular coordinate systems (things other than lay long). In this case, the coordinate system is in local UTM.
Yep, it’s in UTM.
Technically the current GeoJSON standard does not support CRSes https://tools.ietf.org/html/rfc7946#page-12 but the old one does https://geojson.org/geojson-spec.html#coordinate-reference-system-objects
Long term ODM should probably be modified to always export GeoJSON in WGS84 lat/lon (PRs welcome).