[GIS] Converting unknown type of coordinates to lat/lon

coordinate systemgps

Our company is using Total Station (Surveying Machine using SOP) to calculate GPS coordinates and its results are something like this

Easting: 3250193.00, Northing: 1115573.00, Elevation: 656.00
Easting: 3249214.00, Northing: 1111220.00, Elevation: 735.00
...

I want to convert these points to decimal based lat/lon (so that can map those points to google maps). Can someone help me out in converting these points?

The above points are somewhere near to Muzaffarabad, Azad Kashmir. (Some where near to 34.3629, 73.4775)

Best Answer

EPSG:24378 Kalianpur 1975 / India I should be the local CRS in the region you mentioned. The extent seems to fit to that:

enter image description here

To get this picture using QGIS, create these text files:

E N
73.4775 34.3629

and

Easting Northing
3250193.00 1115573.00
3249214.00 1111220.00

Load each into QGIS as Delimited Text File, with blank as delimiter and setting CRS to EPSG:4326 for the first and EPSG:24378 for the second. Project CRS is EPSG:3857 to add Openstreetmap background with the openlayers plugin.

If the data is older than 1975, you might as well look for Kalianpur 1962 or Kalianpur 1880.

You can use GDAL cs2cs or ogr2ogr to reproject the data to any other CRS. For Google Maps, EPSG.4326 would be best.

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