[gdal-dev] UTM local correction for height and distance-to-reference-meridian ?

[Peter Bennewitz]

Dear all,

it's more of an application question than a developer's , - AFAIK there's only 
'gdal-dev' ?  Mea culpa if this doesn't belong here.

To get exact distances between local points, UTM requires a correction factor, 
depending on local height and distance to the UTM reference meridian. Mainly due 
to UTM's 6deg steps, - as opposed to the smaller 3deg of GK, where this 
correction could have been neglected. My current idea is be to transform an area 
of 10km x 12km to XYZ coordinates that closely match 'field measurable' 
distances between two points.

(Pls note that this isn't LatLon<->UTM , for which there are heaps of howto 
websites)

What would be the advised way to handle this in GDAL ?  Or a good keyword to 
find this in the GDAL doc ?  "local coordinates" maybe ? Or convert the dataset 
to the older GK and just use that ?

Any pointers much appreciated, TIA, best,
Peter
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/gdal-dev/attachments/20250121/db3f2fb8/attachment.htm>