EPSG:4240 Indian 1975
Geographic system in latitude and longitude, in use: Thailand - onshore and Gulf of Thailand. Datum, ellipsoid and transformation to WGS 84 below.
| Code | EPSG:4240 |
|---|---|
| Name | Indian 1975 |
| Type | Geographic system |
| Area of use |
Thailand - onshore and Gulf of Thailand Thailand - onshore plus offshore Gulf of Thailand. |
| Bounds | W 97,34° · S 5,63° · E 105,64° · N 20,46° |
| Countries | Thailand |
| Datum | Indian 1975 |
| Ellipsoid | Everest 1830 (1937 Adjustment) a = 6377276.345 m · 1/f = 300.8017 |
| Unit | degree (Lat north, Lon east) |
| Transformation to WGS 84 | Indian 1975 to WGS 84 (4) (EPSG:1812) — accuracy 3 m |
| Scope | Geodesy. |
proj4 definition
+proj=longlat +ellps=evrst30 +towgs84=293,836,318,0.5,1.6,-2.8,2.1 +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:4240.
WKT (ESRI format, the .prj content)
GEOGCS["GCS_Indian_1975",DATUM["D_Indian_1975",SPHEROID["Everest_Adjustment_1937",6377276.345,300.8017]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]Other systems — Thailand
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.