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Geodetic CRS: SAD69
Datum: South American Datum 1969
Ellipsoid: GRS 1967 Modified
Prime meridian: Greenwich
Data source: EPSG
Information source: "Guía Técnica para uso de SIRGAS y GNSS en la minería de Chile: REDGEOMIN y épocas de referencia", Centro de Procesamiento y Análisis Geodésico, University of Santiago, July 2025.
Revision date: 2026-04-21
Scope: Minerals management.
Remarks: Derived at 3 points, RMS 1.50 m.
Method: Cartesian Grid Offsets
Area of use: Chile - onshore south of 43°30'S and west of 72°W.
Description: (0,)
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Definition: OGC Well Known Text 2 (2019)
COORDINATEOPERATION["SAD69 / UTM zone 18S to REDGEOMIN / UTM zone 18S (1)", VERSION["USACH Chl 2025"], SOURCECRS[ PROJCRS["SAD69 / UTM zone 18S", BASEGEOGCRS["SAD69", DATUM["South American Datum 1969", ELLIPSOID["GRS 1967 Modified",6378160,298.25, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4618]], CONVERSION["UTM zone 18S", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-75, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.9996, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",500000, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",10000000, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["(E)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(N)",north, ORDER[2], LENGTHUNIT["metre",1]], ID["EPSG",29188]]], TARGETCRS[ PROJCRS["REDGEOMIN / UTM zone 18S", BASEGEOGCRS["REDGEOMIN", DYNAMIC[ FRAMEEPOCH[2024]], DATUM["Red Geodesica Para Mineria en Chile", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",9696]], CONVERSION["UTM zone 18S", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-75, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.9996, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",500000, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",10000000, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["(E)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(N)",north, ORDER[2], LENGTHUNIT["metre",1]], ID["EPSG",9698]]], METHOD["Cartesian Grid Offsets", ID["EPSG",9656]], PARAMETER["Easting offset",-88.32, LENGTHUNIT["metre",1], ID["EPSG",8728]], PARAMETER["Northing offset",-26.12, LENGTHUNIT["metre",1], ID["EPSG",8729]], OPERATIONACCURACY[2.0], USAGE[ SCOPE["Minerals management."], AREA["Chile - onshore south of 43°30'S and west of 72°W."], BBOX[-54.48,-75.8,-43.49,-72]], ID["EPSG",11381], REMARK["Derived at 3 points, RMS 1.50 m."]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Transformation", "name": "SAD69 / UTM zone 18S to REDGEOMIN / UTM zone 18S (1)", "source_crs": { "type": "ProjectedCRS", "name": "SAD69 / UTM zone 18S", "base_crs": { "type": "GeographicCRS", "name": "SAD69", "datum": { "type": "GeodeticReferenceFrame", "name": "South American Datum 1969", "ellipsoid": { "name": "GRS 1967 Modified", "semi_major_axis": 6378160, "inverse_flattening": 298.25 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4618 }, "remarks": "Uses GRS 1967 ellipsoid with 1/f to exactly 2 decimal places. In Brazil only, replaced by SAD69(96) (CRS code 5527)." }, "conversion": { "name": "UTM zone 18S", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 0, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": -75, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 0.9996, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 500000, "unit": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 10000000, "unit": "metre", "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Easting", "abbreviation": "E", "direction": "east", "unit": "metre" }, { "name": "Northing", "abbreviation": "N", "direction": "north", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 29188 } }, "target_crs": { "type": "ProjectedCRS", "name": "REDGEOMIN / UTM zone 18S", "base_crs": { "type": "GeographicCRS", "name": "REDGEOMIN", "datum": { "type": "DynamicGeodeticReferenceFrame", "name": "Red Geodesica Para Mineria en Chile", "frame_reference_epoch": 2024, "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 9696 }, "remarks": "REDGEOMIN coordinates are updated on a biannual basis identified using syntax \"REDGEOMIN([frame]@[epoch]\", e.g. REDGEOMIN(IGS20@2024.0), REDGEOMIN(IGS20@2024.5), etc. This EPSG record references any of these updates without distinction. Users should include the update used in the metadata of their spatial data metadata. Data should be reduced to this epoch using the ADELA deformation model." }, "conversion": { "name": "UTM zone 18S", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 0, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": -75, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 0.9996, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 500000, "unit": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 10000000, "unit": "metre", "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Easting", "abbreviation": "E", "direction": "east", "unit": "metre" }, { "name": "Northing", "abbreviation": "N", "direction": "north", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 9698 } }, "method": { "name": "Cartesian Grid Offsets", "id": { "authority": "EPSG", "code": 9656 } }, "parameters": [ { "name": "Easting offset", "value": -88.32, "unit": "metre", "id": { "authority": "EPSG", "code": 8728 } }, { "name": "Northing offset", "value": -26.12, "unit": "metre", "id": { "authority": "EPSG", "code": 8729 } } ], "accuracy": "2.0", "scope": "Minerals management.", "area": "Chile - onshore south of 43°30'S and west of 72°W.", "bbox": { "south_latitude": -54.48, "west_longitude": -75.8, "north_latitude": -43.49, "east_longitude": -72 }, "id": { "authority": "EPSG", "code": 11381 }, "remarks": "Derived at 3 points, RMS 1.50 m." }
Definition: Mapnik
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