[MDAL-Developer] MDAL, Python and QGIS

[Paul Harwood]

I had a look at the mdal provider and it does not seem to expose any
mdal symbols.

Paul


On Fri, 2 Dec 2022 at 06:58, Peter Petrik <
peter.petrik at lutraconsulting.co.uk> wrote:

> Hi,
>
> I am wondering if mdal provider does not expose the symbols too, so you
> can use it instead of mdal.dll?
>
> Kind Regards,
> Peter Petrík
> CPO of Mergin Maps
> LI <https://www.linkedin.com/in/peter-petrik/>, Mergin Maps
> <https://www.merginmaps.com>
>
>
>
>
>
> On Thu, Dec 1, 2022 at 11:13 PM Martin Dobias <wonder.sk at gmail.com> wrote:
>
>> Hi Paul
>>
>> On Thu, Dec 1, 2022 at 2:05 PM Paul Harwood <runette at gmail.com> wrote:
>>
>>> The current state is that `pip install mdal-python` can be used in the
>>> OSGEO shell and works correctly and the Python bindings package is then
>>> accessible in the Python Console but it does not work because MDAL (in the
>>> form of mdal.dll / libmdal.so / libmdal.dylib) is not installed in QGIS.
>>>
>>> I thought that QGIS was using MDAL but I guess it is installed in a
>>> different way.
>>>
>>> Does anyone know how this can be addressed?
>>>
>>
>> QGIS uses its own copy of MDAL and by default the library is built into
>> the mdal provider module, that's why there's no mdal.dll or equivalent. It
>> is also possible to compile QGIS with a custom MDAL library, but because
>> has not been spread much outside of QGIS, using the internal copy makes
>> things simpler.
>>
>> I can imagine that if there would be demand for it, the OSGeo4W packaging
>> could be updated so that MDAL would be compiled and shipped as a separate
>> package with a dedicated mdal.dll - that's something to raise with the
>> OSGeo4W maintainers I guess...
>>
>> Regards
>> Martin
>>
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>>
>
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