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Unit: metre
Geodetic CRS: Dart+26-IRF
Datum: Dart+26 Intermediate Reference Frame
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: Severn Partnership on behalf of Irish Rail / Atkins Realis.
Revision date: 2026-05-19
Scope: Engineering survey and topographic mapping for railway applications.
Remarks: Defined through transformation ETRS89-IRE [ETRF2000] to Dart+26-IRF (1) (code 11462) and map projection Dart+26-TM (code 11463). Emulates the Dart+26 Snake projection applied to ETRS89 as realized through Irenet ETRF2000.
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
242204.88 222073.86
Projected bounds:
217073.06 183121.6
267309.46 261102.11
WGS84 bounds:
-6.75 53.1
-6.0 53.8
Definition: OGC Well Known Text
PROJCS["Dart+26 Grid", GEOGCS["Dart+26-IRF", DATUM["Dart+26_Intermediate_Reference_Frame", SPHEROID["GRS 1980",6378137,298.257222101, AUTHORITY["EPSG","7019"]], AUTHORITY["EPSG","1460"]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.0174532925199433, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","11461"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",53.45], PARAMETER["central_meridian",-6.35], PARAMETER["scale_factor",1], PARAMETER["false_easting",243865.8029], PARAMETER["false_northing",222073.5699], UNIT["metre",1, AUTHORITY["EPSG","9001"]], AXIS["Easting",EAST], AXIS["Northing",NORTH], AUTHORITY["EPSG","11464"]]
Definition: OGC Well Known Text 2 (2019)
PROJCRS["Dart+26 Grid", BASEGEOGCRS["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]], ID["EPSG",11461]], CONVERSION["Dart+26-TM", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",53.45, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-6.35, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",1, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",243865.8029, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",222073.5699, 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 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",11464]]
Definition: ESRI Well Known Text
PROJCS["Dart+26_Grid", GEOGCS["GCS_Dart+26-IRF", DATUM["D_Dart+26_Intermediate_Reference_Frame", SPHEROID["GRS_1980",6378137.0,298.257222101]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",243865.8029], PARAMETER["False_Northing",222073.5699], PARAMETER["Central_Meridian",-6.35], PARAMETER["Scale_Factor",1.0], PARAMETER["Latitude_Of_Origin",53.45], UNIT["Meter",1.0]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "ProjectedCRS", "name": "Dart+26 Grid", "base_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)." }, "conversion": { "name": "Dart+26-TM", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 53.45, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": -6.35, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 1, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 243865.8029, "unit": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 222073.5699, "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" } ] }, "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": { "south_latitude": 53.1, "west_longitude": -6.75, "north_latitude": 53.8, "east_longitude": -6 }, "id": { "authority": "EPSG", "code": 11464 } }
Definition: GeoServer
11464=PROJCS["Dart+26 Grid",GEOGCS["Dart+26-IRF",DATUM["Dart+26_Intermediate_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1460"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","11461"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",53.45],PARAMETER["central_meridian",-6.35],PARAMETER["scale_factor",1],PARAMETER["false_easting",243865.8029],PARAMETER["false_northing",222073.5699],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","11464"]]
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=tmerc +lat_0=53.45 +lon_0=-6.35 +k=1 +x_0=243865.8029 +y_0=222073.5699 +ellps=GRS80 +units=m +no_defs +type=crs"> <Layer srs="+proj=tmerc +lat_0=53.45 +lon_0=-6.35 +k=1 +x_0=243865.8029 +y_0=222073.5699 +ellps=GRS80 +units=m +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 11464, 'EPSG', 11464, '+proj=tmerc +lat_0=53.45 +lon_0=-6.35 +k=1 +x_0=243865.8029 +y_0=222073.5699 +ellps=GRS80 +units=m +no_defs +type=crs', 'PROJCS["Dart+26 Grid",GEOGCS["Dart+26-IRF",DATUM["Dart+26_Intermediate_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1460"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","11461"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",53.45],PARAMETER["central_meridian",-6.35],PARAMETER["scale_factor",1],PARAMETER["false_easting",243865.8029],PARAMETER["false_northing",222073.5699],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","11464"]]');
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