Geodesy.
Transformation is exact at epoch 2013.00 but accuracy then decreasing with time.
Time-specific Position Vector transform (geocen)
(0,)
Definition: OGC Well Known Text 2 (2019)
COORDINATEOPERATION["SIRGAS-Chile 2013 to IGb08 (1)", VERSION["IOGP-Chl"], SOURCECRS[ GEODCRS["SIRGAS-Chile 2013", DATUM["SIRGAS-Chile realization 3 epoch 2013", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[Cartesian,3], AXIS["(X)",geocentricX, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(Y)",geocentricY, ORDER[2], LENGTHUNIT["metre",1]], AXIS["(Z)",geocentricZ, ORDER[3], LENGTHUNIT["metre",1]], ID["EPSG",9146]]], TARGETCRS[ GEODCRS["IGb08", DYNAMIC[ FRAMEEPOCH[2005]], DATUM["IGb08", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[Cartesian,3], AXIS["(X)",geocentricX, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(Y)",geocentricY, ORDER[2], LENGTHUNIT["metre",1]], AXIS["(Z)",geocentricZ, ORDER[3], LENGTHUNIT["metre",1]], ID["EPSG",9015]]], METHOD["Time-specific Position Vector transform (geocen)", ID["EPSG",1065]], PARAMETER["X-axis translation",0, LENGTHUNIT["millimetre",0.001], ID["EPSG",8605]], PARAMETER["Y-axis translation",0, LENGTHUNIT["millimetre",0.001], ID["EPSG",8606]], PARAMETER["Z-axis translation",0, LENGTHUNIT["millimetre",0.001], ID["EPSG",8607]], PARAMETER["X-axis rotation",0, ANGLEUNIT["milliarc-second",4.84813681109536E-09], ID["EPSG",8608]], PARAMETER["Y-axis rotation",0, ANGLEUNIT["milliarc-second",4.84813681109536E-09], ID["EPSG",8609]], PARAMETER["Z-axis rotation",0, ANGLEUNIT["milliarc-second",4.84813681109536E-09], ID["EPSG",8610]], PARAMETER["Scale difference",0, SCALEUNIT["parts per million",1E-06], ID["EPSG",8611]], PARAMETER["Transformation reference epoch",2013, TIMEUNIT["year",31556925.445], ID["EPSG",1049]], OPERATIONACCURACY[0.1], USAGE[ SCOPE["Geodesy."], AREA["Chile - onshore and offshore. Includes Easter Island, Juan Fernandez Islands, San Felix, and Sala y Gomez."], BBOX[-59.87,-113.21,-17.5,-65.72]], ID["EPSG",9179], REMARK["Transformation is exact at epoch 2013.00 but accuracy then decreasing with time."]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Transformation", "name": "SIRGAS-Chile 2013 to IGb08 (1)", "source_crs": { "type": "GeodeticCRS", "name": "SIRGAS-Chile 2013", "datum": { "type": "GeodeticReferenceFrame", "name": "SIRGAS-Chile realization 3 epoch 2013", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Geocentric X", "abbreviation": "X", "direction": "geocentricX", "unit": "metre" }, { "name": "Geocentric Y", "abbreviation": "Y", "direction": "geocentricY", "unit": "metre" }, { "name": "Geocentric Z", "abbreviation": "Z", "direction": "geocentricZ", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 9146 } }, "target_crs": { "type": "GeodeticCRS", "name": "IGb08", "datum": { "type": "DynamicGeodeticReferenceFrame", "name": "IGb08", "frame_reference_epoch": 2005, "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Geocentric X", "abbreviation": "X", "direction": "geocentricX", "unit": "metre" }, { "name": "Geocentric Y", "abbreviation": "Y", "direction": "geocentricY", "unit": "metre" }, { "name": "Geocentric Z", "abbreviation": "Z", "direction": "geocentricZ", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 9015 } }, "method": { "name": "Time-specific Position Vector transform (geocen)", "id": { "authority": "EPSG", "code": 1065 } }, "parameters": [ { "name": "X-axis translation", "value": 0, "unit": { "type": "LinearUnit", "name": "millimetre", "conversion_factor": 0.001 }, "id": { "authority": "EPSG", "code": 8605 } }, { "name": "Y-axis translation", "value": 0, "unit": { "type": "LinearUnit", "name": "millimetre", "conversion_factor": 0.001 }, "id": { "authority": "EPSG", "code": 8606 } }, { "name": "Z-axis translation", "value": 0, "unit": { "type": "LinearUnit", "name": "millimetre", "conversion_factor": 0.001 }, "id": { "authority": "EPSG", "code": 8607 } }, { "name": "X-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "milliarc-second", "conversion_factor": 4.84813681109536e-09 }, "id": { "authority": "EPSG", "code": 8608 } }, { "name": "Y-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "milliarc-second", "conversion_factor": 4.84813681109536e-09 }, "id": { "authority": "EPSG", "code": 8609 } }, { "name": "Z-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "milliarc-second", "conversion_factor": 4.84813681109536e-09 }, "id": { "authority": "EPSG", "code": 8610 } }, { "name": "Scale difference", "value": 0, "unit": { "type": "ScaleUnit", "name": "parts per million", "conversion_factor": 1e-06 }, "id": { "authority": "EPSG", "code": 8611 } }, { "name": "Transformation reference epoch", "value": 2013, "unit": { "type": "TimeUnit", "name": "year", "conversion_factor": 31556925.445 }, "id": { "authority": "EPSG", "code": 1049 } } ], "accuracy": "0.1", "scope": "Geodesy.", "area": "Chile - onshore and offshore. Includes Easter Island, Juan Fernandez Islands, San Felix, and Sala y Gomez.", "bbox": { "south_latitude": -59.87, "west_longitude": -113.21, "north_latitude": -17.5, "east_longitude": -65.72 }, "id": { "authority": "EPSG", "code": 9179 }, "remarks": "Transformation is exact at epoch 2013.00 but accuracy then decreasing with time." }