[Proj] Length of a deg in metres

[Nicolas Cadieux]

Hi,
Thanks everyone for pointing me in useful directions.
Nicolas

> Le 9 nov. 2018 à 05:30, Luí­s Moreira de Sousa <luis.de.sousa at protonmail.ch> a écrit :
> 
> Hi Nicolas,
> 
> PROJ itself relies on the GeographicLib package [0] for the computation of geodesics and rhumb lines. Since you are programming in Python, the easiest option is to use directly the GeographicLib port to Python [1].
> 
> Regards.
> 
> [0] https://geographiclib.sourceforge.io/
> [1] https://pypi.org/project/geographiclib/
> 
> --
> Luís Moreira de Sousa
> Email: luis.de.sousa at protonmail.ch
> RingID: ring:7ca91d83f4f9dec82fec9f1144b8e5c1ef2a110c
> URL: https://ldesousa.github.io
> 
> Sent with ProtonMail Secure Email.
> 
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>> On Thursday, November 8, 2018 4:18 PM, Nicolas Cadieux <nicolas.cadieux at archeotec.ca> wrote:
>> 
>> Hi,
>> 
>> 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?
>> 
>> Thanks,
>> 
>> Nicolas
>> 
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>> Proj at lists.maptools.org
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> 
> 
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