Topographic mapping.
1937 adjustment rescaled by ratio metric conversions of Indian foot (1937) to Indian foot (1975).
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Kalianpur 1975", "ellipsoid": { "name": "Everest 1830 (1975 Definition)", "semi_major_axis": 6377299.151, "inverse_flattening": 300.8017255 }, "scope": "Topographic mapping.", "area": "India - mainland onshore.", "bbox": { "south_latitude": 8.02, "west_longitude": 68.13, "north_latitude": 35.51, "east_longitude": 97.42 }, "id": { "authority": "EPSG", "code": 6146 } }