Nimalika, On Fri, Feb 27, 2009 at 8:42 PM, nimalika fernando <nimali...@gmail.com> wrote: > Hi, > > I have used ogr2ogr to assign projection information(SL99) to some vector > data which does not contain any projection information.
How did you do that? Please post the details. > I used the same projection information to reproject a raster in UTM 44N to > SL99.Both data sets contain data of same location. > > When I try to overlay the projected data ( using QGIS where the SL99 is > defined using the same projection information) there is a small shift in two > layers. This may be an indicator for the datum not being recognized properly. > When check the projection information using ogrinfo/gdalinfo I found that > even though the same parameters are used for projection of vector and raster > data , some parts of the WKT is different. I am not sure whether this is the > reason for the problem in overlapping. It might be - the "morphing" of similar names might fail. > The resulting WKT are as follows > > Raster > > PROJCS["Transverse_Mercator", > GEOGCS["Everest 1830", > DATUM["unknown", > SPHEROID["unnamed",6377276.345,300.8017000000115]], > PRIMEM["Greenwich",0], > UNIT["degree",0.0174532925199433]], > PROJECTION["Transverse_Mercator"], > PARAMETER["latitude_of_origin",7.00047], > PARAMETER["central_meridian",80.77171], > PARAMETER["scale_factor",1], > PARAMETER["false_easting",200000], > PARAMETER["false_northing",200000], > UNIT["metre",1, > AUTHORITY["EPSG","9001"]]] > > Vector > > PROJCS["Transverse_Mercator", > GEOGCS["Everest 1830", > DATUM["unknown", > SPHEROID["evrst30",6377276.345,300.8017]], > PRIMEM["Greenwich",0], > UNIT["Degree",0.017453292519943295]], > PROJECTION["Transverse_Mercator"], > PARAMETER["latitude_of_origin",7.00047], > PARAMETER["central_meridian",80.77171], > PARAMETER["scale_factor",1], > PARAMETER["false_easting",200000], > PARAMETER["false_northing",200000], > UNIT["Meter",1]] > > Can anybody help me to identify what went wrong ? please post more details (see above). Markus _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
