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Name: ETRS89-IRE [ETRF2000] to Dart+26-IRF (1)
Method: NTv2
Grid Files: ETRS89-09_to_Dplus26-IRF.gsb
Remarks: In conjunction with the Dart+26-TM map projection (code 11463) applied to Dart+26-IRF (code 11461), emulates the Dart+26 Snake projection. Applied to ETRS89 (as realized through Irenet ETRF2000) defines Dart+26-IRF hence is errorless.
Information source: Severn Partnership on behalf of Irish Rail / Atkins Realis.
Revision date: 2026-05-19
Unit: metre
Geodetic CRS: ETRS89-IRE [ETRF2000]
Datum: ETRS89-IRE [ETRF2000]
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: Ordnance Survey of Ireland
Revision date: 2025-11-12
Scope: Engineering survey, topographic mapping.
Area of use: Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.
Coordinate system: Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.
&stroke=red&width=2&path=53.1,-6.75|53.8,-6.75|53.8,-6.0|53.1,-6.0|53.1,-6.75)
Center coordinates
674309.94 5925539.91
Projected bounds:
648181.02 5885760.61
700840.07 5965445.31
WGS84 bounds:
-6.75 53.1
-6.0 53.8
Definition: OGC Well Known Text 2 (2019)
BOUNDCRS[ SOURCECRS[ PROJCRS["ETRS89-IRE [ETRF2000] / UTM zone 29N", BASEGEOGCRS["ETRS89-IRE [ETRF2000]", DATUM["ETRS89-IRE [ETRF2000]", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ANCHOREPOCH[2009.756]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4173]], CONVERSION["UTM zone 29N", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-9, 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",0, 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]], USAGE[ SCOPE["Engineering survey, topographic mapping."], AREA["Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore."], BBOX[51.39,-10.56,55.43,-5.34]], ID["EPSG",2158]]], TARGETCRS[ GEOGCRS["Dart+26-IRF", DATUM["Dart+26 Intermediate Reference Frame", ELLIPSOID["GRS 1980",6378137,298.257222101, 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["Engineering survey and topographic mapping for railway applications."], AREA["Ireland - on or related to the DART+ rail project from Dublin city centre to Drogheda, Greystones, Hazelhatch and Kilcock."], BBOX[53.1,-6.75,53.8,-6]], ID["EPSG",11461], REMARK["Intermediate CRS created in 2026 to assist the emulation of the ETRS89 / Dart+26 SnakeGrid projected CRS through transformation ETRS89-IRE [ETRF2000] to Dart+26-IRF (1) (code 11462) used in conjunction with the Dart+26-TM map projection (code 11463)."]]], ABRIDGEDTRANSFORMATION["ETRS89-IRE [ETRF2000] to Dart+26-IRF (1)", METHOD["NTv2", ID["EPSG",9615]], PARAMETERFILE["Latitude and longitude difference file","ETRS89-09_to_Dplus26-IRF.gsb"], USAGE[ SCOPE["Engineering survey and topographic mapping for railway applications."], AREA["Ireland - on or related to the DART+ rail project from Dublin city centre to Drogheda, Greystones, Hazelhatch and Kilcock."], BBOX[53.1,-6.75,53.8,-6]], ID["EPSG",11462], REMARK["In conjunction with the Dart+26-TM map projection (code 11463) applied to Dart+26-IRF (code 11461), emulates the Dart+26 Snake projection. Applied to ETRS89 (as realized through Irenet ETRF2000) defines Dart+26-IRF hence is errorless."]]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "BoundCRS", "source_crs": { "type": "ProjectedCRS", "name": "ETRS89-IRE [ETRF2000] / UTM zone 29N", "base_crs": { "type": "GeographicCRS", "name": "ETRS89-IRE [ETRF2000]", "datum": { "type": "GeodeticReferenceFrame", "name": "ETRS89-IRE [ETRF2000]", "anchor_epoch": 2009.756, "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": 4173 } }, "conversion": { "name": "UTM zone 29N", "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": -9, "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": 0, "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": 2158 } }, "target_crs": { "type": "GeographicCRS", "name": "Dart+26-IRF", "datum": { "type": "GeodeticReferenceFrame", "name": "Dart+26 Intermediate Reference Frame", "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": 11461 }, "remarks": "Intermediate CRS created in 2026 to assist the emulation of the ETRS89 / Dart+26 SnakeGrid projected CRS through transformation ETRS89-IRE [ETRF2000] to Dart+26-IRF (1) (code 11462) used in conjunction with the Dart+26-TM map projection (code 11463)." }, "transformation": { "name": "ETRS89-IRE [ETRF2000] to Dart+26-IRF (1)", "method": { "name": "NTv2", "id": { "authority": "EPSG", "code": 9615 } }, "parameters": [ { "name": "Latitude and longitude difference file", "value": "ETRS89-09_to_Dplus26-IRF.gsb", "id": { "authority": "EPSG", "code": 8656 } } ], "id": { "authority": "EPSG", "code": 11462 } } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=utm +zone=29 +ellps=GRS80 +units=m +no_defs +type=crs"> <Layer srs="+proj=utm +zone=29 +ellps=GRS80 +units=m +no_defs +type=crs"> </Layer> </Map>
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