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intersects --show-superseded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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