[Gdal-dev] Link to NTF info?

[Frank Warmerdam]

On 9/24/05, Ben Discoe <ben at vterrain.org> wrote:
> On the page:
>         http://www.gdal.org/ogr/drv_ntf.html
> the link "General UK NTF Information" points to:
>         http://gdal.velocet.ca/projects/ntf/index.html
> Which doesn't seem to be there.

Ben,

Fixed.  It should now be:

  http://home.gdal.org/projects/ntf/index.html

> I'm reading elevation grids from NTF using OGR.  It is a bit strange to use
> OGR for rasters, but OGR is the one with NTF support.  It works great but i
> am wondering if the elevation inside an NTF is always integer or not.  OGR
> returns all values as doubles, but in the NTF files i've seen, the values
> are always whole numbers.

The format supports non-integer values (integer in the file,
but with a scale and offset), but I'm not sure if distributed
datasets have non-integer values or not.

NTF DEM support is in OGR because the client (Safe
Software) at that time wanted to represent DEMs as
alot of point features.

Best regards,

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