Geocentric translations (geog2D domain)
Derived at 7 stations. Accuracy 12m, 10m and 15m in X, Y and Z axes. Care! DMA ellipsoid is inconsistent with EPSG ellipsoid - transformation parameter values may not be appropriate. Also source CRS may not apply to Nepal.
U.S. Defense Mapping Agency TR8350.2 revision of August 1993.
2020-03-14
Geodesy.
Adopts 1975 metric conversion of 0.3047995 metres per Indian foot.
Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree
Definition: OGC Well Known Text
GEOGCS["Kalianpur 1975", DATUM["Kalianpur_1975", SPHEROID["Everest 1830 (1975 Definition)",6377299.151,300.8017255], TOWGS84[295,736,257,0,0,0,0]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.0174532925199433, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4146"]]
Definition: OGC Well Known Text 2 (2019)
GEOGCRS["Kalianpur 1975", DATUM["Kalianpur 1975", ELLIPSOID["Everest 1830 (1975 Definition)",6377299.151,300.8017255, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,2], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], USAGE[ SCOPE["Geodesy."], AREA["India - mainland onshore."], BBOX[8.02,68.13,35.51,97.42]], ID["EPSG",4146]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeographicCRS", "name": "Kalianpur 1975", "datum": { "type": "GeodeticReferenceFrame", "name": "Kalianpur 1975", "ellipsoid": { "name": "Everest 1830 (1975 Definition)", "semi_major_axis": 6377299.151, "inverse_flattening": 300.8017255 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "scope": "Geodesy.", "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": 4146 } }
Definition: GeoServer
4146=GEOGCS["Kalianpur 1975",DATUM["Kalianpur_1975",SPHEROID["Everest 1830 (1975 Definition)",6377299.151,300.8017255],TOWGS84[295,736,257,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4146"]]
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=longlat +a=6377299.151 +rf=300.8017255 +towgs84=295,736,257,0,0,0,0 +no_defs +type=crs"> <Layer srs="+proj=longlat +a=6377299.151 +rf=300.8017255 +towgs84=295,736,257,0,0,0,0 +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4146, 'EPSG', 4146, '+proj=longlat +a=6377299.151 +rf=300.8017255 +towgs84=295,736,257,0,0,0,0 +no_defs +type=crs', 'GEOGCS["Kalianpur 1975",DATUM["Kalianpur_1975",SPHEROID["Everest 1830 (1975 Definition)",6377299.151,300.8017255],TOWGS84[295,736,257,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4146"]]');