[Geotiff] User defined datum: Transformation parameters

[Christian Zietz]

Frank,

> Would you consider switching to using 2062 for GeogToWGS84GeoKey?  This
> puts it in the "geographic sc parameter keys" range.

Sure, that's not a problem since neither the software nor any of the
data files using the new key has left my computer until now.

So, now it is

GeogToWGS84GeoKey

KeyID = 2062
Type = 7 * DOUBLE
Values = dX, dY, dZ, Rx, Ry, Rz, dS

> With that minor adjustment I'd be happy to post this as a technical note
> on the geotiff web site, and also incorporate it in GDAL as well as add
> support in the "normalize" machinery in libgeotiff for it.

That would be great. Thanks!

> It would be convenient if you could also supply a small sample file
> demonstrating the new geokey.

I'll see what I can do. I can't release the files I'm using here into
the public but I'll try to get some public domain data  (or make
something up).

Christian
-- 
Christian Zietz  -  CHZ-Soft  -  czietz at gmx.net
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