[PROJ] Supported geographical coordinate formats

[Charles Karney]

Because PROJ uses the order of the coordinates to distinguish latitude
and longitude.  E.g.,

   echo 4N 10W | cs2cs +proj=latlong

=>

   4dE     10dS 0.000


On 7/2/20 9:43 AM, Andreas B wrote:
> Thanks for answering Charles.
> 
> I'm not sure if I understand. Why would 10W be interpreted as lat = -10?
> 
> 
> Andreas
> 
> On Thu, Jul 2, 2020 at 3:33 PM Charles Karney <charles at karney.com> wrote:
>>
>> One major usability issue with PROJ is that the hemisphere designators
>> NESW *only* specify the sign of the coordinate.  Thus it's easy for
>> 10W to be interpreted as lat = -10.  Fixing this would required some
>> replumbing of PROJ since the two horizontal components would need to
>> be decoded together.
>>
>> On 7/2/20 9:17 AM, Andreas B wrote:
>>> Hi,
>>>
>>> Is there any formal description or definition of what kind of
>>> geographical coordinate format the proj command line tools support
>>> (input and output)?
>>>
>>> Several styles are presented in the docs, e.g.
>>> (https://proj.org/apps/cs2cs.html#using-proj-strings)
>>>
>>> 45d15'33.1" 111.5W
>>> 45d15.551666667N -111d30
>>> +45.25919444444 111d30'000w
>>>
>>> Any preferred format?
>>>
>>> Thanks,
>>> Andreas

-- 
Charles Karney <charles at karney.com>
Princeton, NJ