[Proj] Length of a deg in metres
charles.karney at sri.com
Thu Nov 8 13:06:37 EST 2018
Dunno about getting the result from proj. The formula you want is given
This includes the ellipsoidal correction.
On 11/8/18 10:18 AM, Nicolas Cadieux wrote:
> I am writing to python code to calculate the length (in metres) of a
> degree of longitude at a certain degree of latitude. I would like to
> take various ellipsoid in mind (WGS84, GRS80, Clarke 1866...). The goal
> is to find the right scale (or z factor) when making slope or shade
> raster models when x and y are in long/lat and z in feet or meters. Can
> someone point me in the right direction to do this in using Proj? Is
> Proj the best option for this?
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> Proj at lists.maptools.org
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