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Geodetic CRS: ETRS89-ITA [RDN2008]
Datum: Rete Dinamica Nazionale 2008
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: Istituto Geografico Militare (IGM), www.igmi.org
Revision date: 2025-10-28
Scope: Reversible geoid model transformation.
Remarks: Reversible alternative to ETRS89-ITA [RDN2008] to Cagliari 1956 height (1) (code 9728).
Method: Geog3D to Geog2D+GravityRelatedHeight (ITAL2005)
Area of use: Italy - Sardinia onshore.
Description: (0,)
Definition: OGC Well Known Text 2 (2019)
COORDINATEOPERATION["ETRS89-ITA [RDN2008] to ETRS89-ITA [RDN2008] + Cagliari 1956 height (1)", VERSION["IGM-Ita 2005 Sardinia"], SOURCECRS[ GEOGCRS["ETRS89-ITA [RDN2008]", DATUM["Rete Dinamica Nazionale 2008", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ANCHOREPOCH[2008]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,3], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], AXIS["ellipsoidal height (h)",up, ORDER[3], LENGTHUNIT["metre",1]], ID["EPSG",6705]]], TARGETCRS[ COMPOUNDCRS["ETRS89-ITA [RDN2008] + Cagliari 1956 height", GEOGCRS["ETRS89-ITA [RDN2008]", DATUM["Rete Dinamica Nazionale 2008", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ANCHOREPOCH[2008]], 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]]], VERTCRS["Cagliari 1956 height", VDATUM["Cagliari 1956"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]]], ID["EPSG",9725]]], METHOD["Geog3D to Geog2D+GravityRelatedHeight (ITAL2005)", ID["EPSG",1105]], PARAMETERFILE["Geoid (height correction) model file","geo_igm_mar06.grd"], INTERPOLATIONCRS[ GEOGCRS["ETRS89-ITA [RDN2008]", DATUM["Rete Dinamica Nazionale 2008", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ANCHOREPOCH[2008]], 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]]]], OPERATIONACCURACY[0.035], USAGE[ SCOPE["Reversible geoid model transformation."], AREA["Italy - Sardinia onshore."], BBOX[38.82,8.08,41.31,9.89]], ID["EPSG",9730], REMARK["Reversible alternative to ETRS89-ITA [RDN2008] to Cagliari 1956 height (1) (code 9728)."]]
Definition: JavaScript (Proj4js)
proj4.defs("EPSG:9730","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=geo_igm_mar06.grd +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1");
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Transformation", "name": "ETRS89-ITA [RDN2008] to ETRS89-ITA [RDN2008] + Cagliari 1956 height (1)", "source_crs": { "type": "GeographicCRS", "name": "ETRS89-ITA [RDN2008]", "datum": { "type": "GeodeticReferenceFrame", "name": "Rete Dinamica Nazionale 2008", "anchor_epoch": 2008, "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" }, { "name": "Ellipsoidal height", "abbreviation": "h", "direction": "up", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 6705 }, "remarks": "Replaces ETRS89-ITA [IGM95] (CRS code 4983) from 2011-11-10." }, "target_crs": { "type": "CompoundCRS", "name": "ETRS89-ITA [RDN2008] + Cagliari 1956 height", "components": [ { "type": "GeographicCRS", "name": "ETRS89-ITA [RDN2008]", "datum": { "type": "GeodeticReferenceFrame", "name": "Rete Dinamica Nazionale 2008", "anchor_epoch": 2008, "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" } ] }, "remarks": "Replaces ETRS89-ITA [IGM95] (CRS code 4670) from 2011-11-10." }, { "type": "VerticalCRS", "name": "Cagliari 1956 height", "datum": { "type": "VerticalReferenceFrame", "name": "Cagliari 1956" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] } } ], "id": { "authority": "EPSG", "code": 9725 } }, "interpolation_crs": { "type": "GeographicCRS", "name": "ETRS89-ITA [RDN2008]", "datum": { "type": "GeodeticReferenceFrame", "name": "Rete Dinamica Nazionale 2008", "anchor_epoch": 2008, "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": 6706 }, "remarks": "Replaces ETRS89-ITA [IGM95] (CRS code 4670) from 2011-11-10." }, "method": { "name": "Geog3D to Geog2D+GravityRelatedHeight (ITAL2005)", "id": { "authority": "EPSG", "code": 1105 } }, "parameters": [ { "name": "Geoid (height correction) model file", "value": "geo_igm_mar06.grd", "id": { "authority": "EPSG", "code": 8666 } } ], "accuracy": "0.035", "scope": "Reversible geoid model transformation.", "area": "Italy - Sardinia onshore.", "bbox": { "south_latitude": 38.82, "west_longitude": 8.08, "north_latitude": 41.31, "east_longitude": 9.89 }, "id": { "authority": "EPSG", "code": 9730 }, "remarks": "Reversible alternative to ETRS89-ITA [RDN2008] to Cagliari 1956 height (1) (code 9728)." }
Definition: MapServer - MAPfile
PROJECTION "proj=pipeline" "step" "proj=axisswap" "order=2,1" "step" "proj=unitconvert" "xy_in=deg" "xy_out=rad" "step" "inv" "proj=vgridshift" "grids=geo_igm_mar06.grd" "multiplier=1" "step" "proj=unitconvert" "xy_in=rad" "xy_out=deg" "step" "proj=axisswap" "order=2,1" END
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=geo_igm_mar06.grd +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1"> <Layer srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=geo_igm_mar06.grd +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9730, 'EPSG', 9730, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=geo_igm_mar06.grd +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');
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