Alex, Can you provide access to an example file? If distribution is an issue, you can make it available just to me.
Best regards, On Sat, Nov 14, 2009 at 1:10 PM, A.J. Carter <ajc...@maths.leeds.ac.uk> wrote: > Hello, > > I was hoping someone might be able to help me with a query about using the > OGR library to read an Ordnance Survey Landform Profile file in NTf format: > > http://www.ordnancesurvey.co.uk/oswebsite/products/landformprofile/techinfo.html > > The file contains a 501 X 501 grid with height values at each point. From > the technical reference on the OS web page it lists this as being stored > within a field called Z_COORD. Manually inspecting the NTF file (which is > plain text) I can see values like 00159 meaning 15.9m AOD. If I run the NTF > through OGRINFO -al on the file produces a feature for this point: > > OGRFeature)DTM_SD19SW):1 > HEIGHT (Integer) = 15 > POINT (310000.0 490000.0 15.899999618530273) > > At the moment I can't understand why it's writing out the height as an > integer, and also where the many decimal places in the z coordinate of the > point have come from. > > Any help would be much appreciated. > > I'm relatively new to GIS software; sorry if this is a silly question! > > Many thanks, > Alex > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev > -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
