[Proj] converting WGS84/ETRS89 to ITM/OSGM15
elmir.jagudin at gmail.com
Wed Aug 22 04:19:14 EST 2018
I'm trying to convert a WGS84/ETRS89 positions in Ireland into a ITM (Irish
Transverse Mercator) easting northings and OSGM15 elevations.
Using the this commands:
echo -6.6 53 21 | /proj \
+proj=tmerc +lat_0=53.5 +lon_0=-8 +k=0.99982 +x_0=600000 +y_0=750000
+towgs84=0,0,0,0,0,0,0 +units=m +no_defs
693972.63 695281.52 21
The easting and northing are correct, however the elevation is not, the
correct value is -35.15.
Is it possible to use proj4 to calculate OSGM15 elevations? What should the
proj-string be in that case?
Or do i need to create a .gtx file for OSGM15?
Not sure how the elevations work in proj4, is there any documentation i
Thanks in advance,
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Proj