Ellipsoid: International 1924
Prime meridian: Greenwich
Data source: EPSG
Information source: NIMA http://earth-info.nima.mil/
Revision date: 2009-06-02
Scope: Geodesy.
Remarks: The Chua origin and associated network is in Brazil with a connecting traverse through northern Paraguay. It was used in Brazil only as input into the Corrego Allegre adjustment and for government work in Distrito Federal.
Area of use: Brazil - south of 18°S and west of 54°W, plus Distrito Federal. Paraguay - north.
WGS84 bounds:
-47.1 -31.91
-62.57 -15.37
Definition: OGC Well Known Text
DATUM["Chua", SPHEROID["International 1924",6378388,297, AUTHORITY["EPSG","7022"]], AUTHORITY["EPSG","6224"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["Chua", ELLIPSOID["International 1924",6378388,297, LENGTHUNIT["metre",1]], ID["EPSG",6224]]
Definition: ESRI Well Known Text
DATUM["D_Chua", SPHEROID["International_1924",6378388.0,297.0]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Chua", "ellipsoid": { "name": "International 1924", "semi_major_axis": 6378388, "inverse_flattening": 297 }, "scope": "Geodesy.", "area": "Brazil - south of 18°S and west of 54°W, plus Distrito Federal. Paraguay - north.", "bbox": { "south_latitude": -31.91, "west_longitude": -62.57, "north_latitude": -15.37, "east_longitude": -47.1 }, "id": { "authority": "EPSG", "code": 6224 } }