EPSG:31370 BD72 / Belgian Lambert 72
Projected system (Lambert Conic Conformal (2SP)) in use: Belgium - onshore. The full definition below, and conversion in one click.
| Code | EPSG:31370 |
|---|---|
| Name | BD72 / Belgian Lambert 72 |
| Type | Projected system — Lambert Conic Conformal (2SP) |
| Area of use | Belgium - onshore |
| Bounds | W 2,50° · S 49,50° · E 6,40° · N 51,51° |
| Countries | Belgium |
| Datum | Reseau National Belge 1972 |
| Ellipsoid | International 1924 a = 6378388 m · 1/f = 297 |
| Base geographic system | EPSG:4313 — BD72 |
| Unit | metre (X east, Y north) |
| Transformation to WGS 84 | BD72 to WGS 84 (3) (EPSG:15929) — accuracy 1 m |
| Scope | Engineering survey, topographic mapping. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of false origin | 90 | degree |
| Longitude of false origin | 4.367486666666666 | degree |
| Latitude of 1st standard parallel | 51.16666723333333 | degree |
| Latitude of 2nd standard parallel | 49.8333339 | degree |
| Easting at false origin | 150000.013 | metre |
| Northing at false origin | 5400088.438 | metre |
proj4 definition
+proj=lcc +lat_0=90 +lon_0=4.36748666666667 +lat_1=51.1666672333333 +lat_2=49.8333339 +x_0=150000.013 +y_0=5400088.438 +ellps=intl +units=m +towgs84=-106.8686,52.2978,-103.7239,0.3366,-0.457,1.8422,-1.2747 +no_defsPaste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:31370.
WKT (ESRI format, the .prj content)
PROJCS["Belge_Lambert_1972",GEOGCS["GCS_Belge_1972",DATUM["D_Belge_1972",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",150000.013],PARAMETER["False_Northing",5400088.438],PARAMETER["Central_Meridian",4.36748666666667],PARAMETER["Standard_Parallel_1",51.1666672333333],PARAMETER["Standard_Parallel_2",49.8333339],PARAMETER["Latitude_Of_Origin",90.0],UNIT["Meter",1.0]]Other systems — Belgium
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.