Topographic mapping.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Nord de Guerre (Paris)", "ellipsoid": { "name": "Plessis 1817", "semi_major_axis": 6376523, "inverse_flattening": 308.64 }, "prime_meridian": { "name": "Paris", "longitude": { "value": 2.5969213, "unit": { "type": "AngularUnit", "name": "grad", "conversion_factor": 0.0157079632679489 } } }, "scope": "Topographic mapping.", "area": "France - Alsace.", "bbox": { "south_latitude": 47.42, "west_longitude": 6.84, "north_latitude": 49.07, "east_longitude": 8.23 }, "id": { "authority": "EPSG", "code": 6902 } }