[PROJ] Finding not implemented projections

[Javier Jimenez Shaw]

Thanks Thomas

Does it mean that the W-N systems are still used? Or is it a relic from the
past? I found EPSG:3053 because a colleague was looking for something with
"abnormal" axis order (more than N-E (many), W-S (South Africa) and S-W
(Czechia))
In Czechia they also have a "normalized" version that is E-N, to avoid
problems in software.

On Fri, 27 Feb 2026 at 14:12, Thomas Knudsen <knudsen.thomas at gmail.com>
wrote:

> The west oriented LCC has been used in Denmark, Iceland and perhaps also
> Greenland,
> cf
> https://krigsvidenskab.dk/application/files/1816/1530/1487/Skaermbillede_2021-03-09_kl._15.50.52.png
>
> For the Danish cases, recent compatibility reimplementations, EPSG:10258
> and EPSG:10262,
> formalizes existing practice, switching to east oriented by multiplying
> the westing coordinate by -1
>
> /Thomas
>
> Den tors. 26. feb. 2026 kl. 11.29 skrev Javier Jimenez Shaw via PROJ <
> proj at lists.osgeo.org>:
>
>> Hi
>>
>> Today I met "by accident" EPSG:3053
>> https://spatialreference.org/ref/epsg/3053/
>> looking for a westing-northing system.
>>
>> I realized that the projection "Lambert Conic Conformal (West
>> Orientated)" is not implemented (all fine, I don't want it to be
>> implemented).
>>
>> What I want to know is which CRSs from the catalog do not have an
>> implemented projection, to avoid using them.
>> We are using "proj_get_crs_info_list_from_database" to get the list of
>> all the systems (13722). It includes the field "projection_method_name" (a
>> string).
>> Is there any function in C or C++ API to know if such a method is
>> implemented? Doing a quick search in spatialreference I see there are 53
>> methods in total nowadays.
>> I don't want to hardcode that list in my code, in case anything changes
>> in the future.
>>
>> Thank you.
>>
>> Cheers
>> Javier.
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>> PROJ at lists.osgeo.org
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>>
>
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