Coordinates Reference Systems

Geoportal's API supports coordinates reference systems as defined in OGC standards. One can find some EPSG codes as well as IGN's own CRS catalogue. This later catalogue gives the mapping, whenever it exists, between IGNF codes and EPSG codes.

Coordinates reference systems depend upon territory and accessed services (by default, mouse positions are can be rendered in any of the following coordinates reference systems except when contrarily written). Main coordinates reference systems are :

CodeTerritory nameCoordinates systemsServicesAPI type support
FXXFrance mainlandIGNF:GEOPORTALFXX 
IGNF:RGF93G 
IGNF:LAMB93 
IGNF:LAMBE 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
GLP SBA SMAGuadeloupe Saint-Bartélémy Saint-MartinIGNF:GEOPORTALANF 
IGNF:WGS84RRAFGEO 
IGNF:UTM20W84GUAD 
IGNF:GUADFM49U20 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
GUFGuyaneIGNF:GEOPORTALGUF 
IGNF:RGFG95GEO 
IGNF:UTM22RGFG95 
IGNF:CSG67UTM22 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
MTQMartiniqueIGNF:GEOPORTALANF 
IGNF:WGS84RRAFGEO 
IGNF:UTM20W84MART 
IGNF:MART38UTM20 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
MYTMayotte Juan de Nova island Glorieuses island Tromelin islandIGNF:GEOPORTALMYT 
IGNF:RGM04GEO 
IGNF:RGM04UTM38S 
IGNF:MAYO50UTM38S 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
NCLNew CaledoniaIGNF:GEOPORTALNCL 
IGNF:RGNCGEO 
IGNF:RGNCUTM58S 
IGNF:IGN72UTM58S 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
PYFFrench polynesiaIGNF:GEOPORTALPYF 
IGNF:RGPFGEO 
IGNF:RGPFUTM5S 
IGNF:TAHAAUTM05S 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
REUReunion island Basas da India islands Europa islandIGNF:GEOPORTALREU 
IGNF:RGR92GEO 
IGNF:RGR92UTM40S 
IGNF:REUN47GAUSSL 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
SPMSaint-Pierre-et-MiquelonIGNF:GEOPORTALSPM 
IGNF:RGSPM06GEO 
IGNF:RGSPM06U21 
IGNF:STPM50UTM21 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
WLFWallis and FutunaIGNF:GEOPORTALWLF 
IGNF:WGS84G 
IGNF:UTM01SW84 IGNF:WALL78UTM1S 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
CRZCrozet islandsIGNF:GEOPORTALCRZ 
IGNF:WGS84G 
IGNF:UTM39SW84 
IGNF:CROZ63UTM39S 
EPSG:3857		WMS-C, 
WFS, 
WMS 
 
WMTS		all (default) 
all 
all 
extended only 
all
KERKerguelen islandsIGNF:GEOPORTALKER 
IGNF:WGS84G 
IGNF:UTM42SW84 
IGNF:KERG62UTM42S 
EPSG:3857		WMS-C, 
WFS, 
WMS 
WMTS		all (default) 
all 
all 
extended only 
all
ASPSaint-Paul and Amsterdam islandsIGNF:GEOPORTALASP 
IGNF:WGS84G 
IGNF:UTM43SW84 
EPSG:3857		WMS-C, 
WFS, 
WMS 
WMTS		all (default) 
all 
all 
all
ATFDumont d'UrvilleIGNF:TERA50STEREO 
EPSG:3857		WMS-C 
WMTS		all (default) 
all
WLDthe WorldIGNF:MILLER 
CRS:84 
EPSG:3857		WMS-C 
 
WMTS		all (default) 
all 
all

Legal coordinates reference systems access will be set up for GIS professional applications (WMS, WFS) with the 1.0 API release.

WMS will be opened for the 1.2 API release on the IGN's vector/raster databases.

WFS will be opened for the 2.0 API release on the IGN's vector databases.

WMTS will be opened for the 2.0 API release.

Mapping between IGNF and EPSG codes for WMS-C services

There codes can by used in WMS-C request :

IGNF CodeEPSG CodeWKT definition
IGNF:GEOPORTALFXXEPSG:310024802PROJCS["Géoportail - France métropolitaine",GEOGCS["Réseau géodésique français 1993",DATUM["Réseau géodésique français 1993",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG024"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGF93G"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9001"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",46.500000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALFXX"]]
IGNF:GEOPORTALANFEPSG:310915814PROJCS["Géoportail - Antilles françaises",GEOGCS["Réseau de référence des Antilles françaises (1988-1991)",DATUM["Réseau de référence des Antilles françaises (1988-1991)",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG495"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","WGS84RRAFGEO"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9002"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",15.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALANF"]]
IGNF:GEOPORTALGUFEPSG:310486805PROJCS["Géoportail - Guyane",GEOGCS["Réseau géodésique français de Guyane 1995",DATUM["Réseau géodésique français de Guyane 1995",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG486"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGFG95GEO"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9003"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",4.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALGUF"]]
IGNF:GEOPORTALREUEPSG:310700806PROJCS["Géoportail - Réunion et dépendances",GEOGCS["Réseau géodésique de la Réunion 1992",DATUM["Réseau géodésique de la Réunion 1992 (RGR92)",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG700"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGR92GEO"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9004"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",-21.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALREU"]]
IGNF:GEOPORTALMYTEPSG:310702807PROJCS["Géoportail - Mayotte",GEOGCS["RGM04 (Réseau Géodésique de Mayotte 2004)",DATUM["RGM04 (RESEAU GEODESIQUE DE MAYOTTE 2004)",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG702"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGM04GEO"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9005"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",-12.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALMYT"]]
IGNF:GEOPORTALSPMEPSG:310706808PROJCS["Géoportail - Saint-Pierre et Miquelon",GEOGCS["Saint-Pierre-et-Miquelon (2006)",DATUM["St Pierre et Miquelon 2006",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG706"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGSPM06GEO"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9006"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",47.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALSPM"]]
IGNF:GEOPORTALNCLEPSG:310547809PROJCS["Géoportail - Nouvelle-Calédonie",GEOGCS["Réseau Géodésique de Nouvelle-Calédonie",DATUM["RESEAU GEODESIQUE DE NOUVELLE-CALEDONIE (RGNC 1991)",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG547"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGNCGEO"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9007"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",-22.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALNCL"]]
IGNF:GEOPORTALWLFEPSG:310642810PROJCS["Géoportail - Wallis et Futuna",GEOGCS["World Geodetic System 1984",DATUM["WGS84",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0.0000,0.0000,0.0000,0.000000],AUTHORITY["IGNF","REG642"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","WGS84G"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9008"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",-14.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALWLF"]]
IGNF:GEOPORTALPYFEPSG:310032811PROJCS["Géoportail - Polynésie française",GEOGCS["RGPF (Réseau Géodésique de Polynésie Française)",DATUM["RGPF (RESEAU GEODESIQUE DE POLYNESIE FRANCAISE)",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG032"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGPFGEO"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9009"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",-15.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALPYF"]]
IGNF:GEOPORTALKEREPSG:310642812PROJCS["Géoportail - Kerguelen",GEOGCS["Réseau Géodésique des TAAF (2007) (dms)",DATUM["RESEAU GEODESIQUE DES TERRES AUSTRALES ET ANTARCTIQUES FRANCAISES 2007",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG036"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGTAAF07G"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9010"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",-49.500000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALKER"]]
IGNF:GEOPORTALCRZEPSG:310642801PROJCS["Géoportail - Crozet",GEOGCS["Réseau Géodésique des TAAF (2007) (dms)",DATUM["RESEAU GEODESIQUE DES TERRES AUSTRALES ET ANTARCTIQUES FRANCAISES 2007",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG036"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGTAAF07G"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9011"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",-46.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALCRZ"]]
IGNF:GEOPORTALASPEPSG:310642813PROJCS["Géoportail - Amsterdam et Saint-Paul",GEOGCS["Réseau Géodésique des TAAF (2007) (dms)",DATUM["RESEAU GEODESIQUE DES TERRES AUSTRALES ET ANTARCTIQUES FRANCAISES 2007",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0,0,0,0],AUTHORITY["IGNF","REG036"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","RGTAAF07G"]],PROJECTION["Equidistant_Cylindrical",AUTHORITY["IGNF","PRC9012"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["latitude_of_origin",0.000000000],PARAMETER["central_meridian",0.000000000],PARAMETER["standard_parallel_1",-38.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","GEOPORTALASP"]]
IGNF:TERA50STEREOEPSG:2986PROJCS["Terre Adélie 1950",GEOGCS["Pointe Géologie - Perroud 1950",DATUM["Pointe géologie-Perroud 1950",SPHEROID["International-Hayford 1909",6378388.0000,297.0000000000000,AUTHORITY["IGNF","ELG001"]],TOWGS84[324.9120,153.2820,172.0260,0,0,0,0],AUTHORITY["IGNF","REG009"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","TERA50G"]],PROJECTION["Oblique_Stereographic",AUTHORITY["IGNF","PRC0901"]],PARAMETER["semi_major",6378388.0000],PARAMETER["semi_minor",6356911.9461],PARAMETER["latitude_of_origin",-90.000000000],PARAMETER["central_meridian",140.000000000],PARAMETER["scale_factor",0.96027295],PARAMETER["false_easting",300000.000],PARAMETER["false_northing",-2299363.482],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","TERA50STEREO"]]
IGNF:MILLEREPSG:310642901PROJCS["Géoportail - Monde",GEOGCS["World Geodetic System 1984",DATUM["WGS84",SPHEROID["IAG GRS 1980",6378137.0000,298.2572221010000,AUTHORITY["IGNF","ELG037"]],TOWGS84[0.0000,0.0000,0.0000,0.0000,0.0000,0.0000,0.000000],AUTHORITY["IGNF","REG642"]],PRIMEM["Greenwich",0.000000000,AUTHORITY["IGNF","LGO01"]],UNIT["degree",0.01745329251994330],AXIS["Longitude",EAST],AXIS["Latitude",NORTH],AUTHORITY["IGNF","WGS84G"]],PROJECTION["Miller_Cylindrical",AUTHORITY["IGNF","PRC9901"]],PARAMETER["semi_major",6378137.0000],PARAMETER["semi_minor",6378137.0000],PARAMETER["central_meridian",0.000000000],PARAMETER["false_easting",0.000],PARAMETER["false_northing",0.000],UNIT["metre",1],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IGNF","MILLER"]]
IGNF:WGS84WMSVEPSG:3857PROJCS["Popular Visualisation CRS / Mercator",GEOGCS["Popular Visualisation CRS",DATUM["Popular Visualisation Datum",SPHEROID["Popular Visualisation Sphere",6378137, 0, AUTHORITY["EPSG",7059]],TOWGS84[0, 0, 0, 0, 0, 0, 0],AUTHORITY["EPSG",6055]],PRIMEM["Greenwich", 0,AUTHORITY["EPSG", "8901"]],UNIT["degree", 0.0174532925199433,AUTHORITY["EPSG", "9102"]],AXIS["E", EAST], AXIS["N", NORTH],AUTHORITY["EPSG",4055]],PROJECTION["Mercator"],PARAMETER["False_Easting", 0],PARAMETER["False_Northing", 0],PARAMETER["Central_Meridian", 0],PARAMETER["Latitude_of_origin", 0],UNIT["metre", 1, AUTHORITY["EPSG","9001"]], AXIS["East", EAST],AXIS["North", NORTH],AUTHORITY["EPSG",3785]]

Codes in italic are un-official EPSG codes.

2D Web Javascript API

Geoportal's Javascript API supports coordinates reference systems through the PROJ4JS project.

Accessing unsupported CRS

The API only supports in its extended release more than 200 CRSs. If one wants to use an unsupported CRS, it is necessary to add a proxy as the API uses Ajax to get access to the Spatial Reference web site. For more information about proxy setting, see Layer access.

Eventually, one can directly add the CRS definition in the web page as follows :

<!DOCTYPE html>
<html>
  <head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
  </head>
  <body>
    <div id="viewerDiv" style="width:800px;height:600px;"></div>
    <script type="text/javascript"><!--//--><![CDATA[//><!--
        window.onload= function() {
            Geoportal.load("viewerDiv", {
                ['YOUR_LICENSE'],
                null,
                null, {
                    onBeforeView: function() {
                        //add new projection
                        Proj4js.defs['EPSG:32630']=
'+proj=utm +zone=30 +ellps=WGS84 +datum=WGS84 +units=m +no_defs +title=UTM North Zone 30 - France';
                    }
                }
            )
        };
    //--><!]]></script>
    <script type="text/javascript" src="http://api.ign.fr/geoportail/api/js/VERSION/Geoportal.js" charset="utf-8">
    <!--//--><![CDATA[//><!--
    //--><!]]>
    </script>
  </body>
</html>