[PROJ] EPSG:1104

[Even Rouault]

Torill,

the area of use of EPSG:1104 is

     USAGE[
         SCOPE["Military survey."],
         AREA["Mali."],
         BBOX[10.14,-12.25,25.01,4.26]],

with this very interesting remark:

     REMARK["Derived at 1 station connected to the Adindan (Blue Nile 
1958) network through the 1968-69 12th parallel traverse. Accuracy 25m 
in each axis. Note: the Adindan (Blue Nile 1958) CRS is used in Ethiopia 
and Sudan, not Mali."]]

The area of use of EPSG:4201 is

     USAGE[
         SCOPE["Geodesy."],
         AREA["Eritrea; Ethiopia; South Sudan; Sudan."],
         BBOX[3.4,21.82,22.24,47.99]],

So there is no intersection between both, hence EPSG:1104 is discarded.

Even

Le 15/12/2023 à 12:01, Torill Kjøsnes Gabrielsen via PROJ a écrit :
>
> Hi,
>
> I am writing to inquire about the availability of the EPSG:1104 
> transformation in PROJ 9.3.1 and 9.2. I have noticed that PROJ 
> supports the EPSG:1104 coordinate operation method;
>
> /projinfo //urn:ogc:def:coordinateOperation:EPSG::1104/.
>
> However, when I try to use this transformation in the projinfo command 
> for transformation between coordinates expressed in EPSG:4201 and 
> EPSG:4326, the EPSG:1104 method is not listed as a candidate;
>
> projinfo -s 'EPSG:4201' -t 'EPSG:4326' -o PROJ --spatial-test 
> intersects --show-superseded
>
> As far as I know, the EPSG:1104 transformation is a valid 3-parameter 
> transformation and should be applicable for transforming coordinates 
> between these two CRSs. Therefore, I was wondering if there is a 
> reason why this transformation is not listed as a candidate by the 
> projinfo command.
>
> Thanks for your help and support.
>
> Best regards,
>
> Torill Kjøsnes Gabrielsen
>
>
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> PROJ at lists.osgeo.org
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