Topographic mapping.
Definition: OGC Well Known Text 2 (2019)
DATUM["Batavia (Jakarta)", ELLIPSOID["Bessel 1841",6377397.155,299.1528128, LENGTHUNIT["metre",1]], ID["EPSG",6813]], PRIMEM["Jakarta",106.807719444444, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8908]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Batavia (Jakarta)", "ellipsoid": { "name": "Bessel 1841", "semi_major_axis": 6377397.155, "inverse_flattening": 299.1528128 }, "prime_meridian": { "name": "Jakarta", "longitude": 106.807719444444 }, "scope": "Topographic mapping.", "area": "Indonesia - onshore - Bali, Java and western Sumatra.", "bbox": { "south_latitude": -8.91, "west_longitude": 95.16, "north_latitude": 5.97, "east_longitude": 115.77 }, "id": { "authority": "EPSG", "code": 6813 } }