[MDAL-Developer] Installing MDAL

[Paul Harwood]

{re-adding the whole group}

Just to re-iterate the first point - MDAL is compiled into QGIS so you
cannot change the version of MDAL in a version of QGIS and Conda does not
change the version used by QGIS. That is just how it is.

MDAL does open FLO-2D datasets. I can see that in QGIS, I am not a FLO-2D
person but the details of the files needed are shown in the MDAL
documentation https://www.mdal.xyz/drivers/flo2d.html#driver-flo2d.

WIth some experimentation with the test dataset from MDAL (the only FLO-2D
data I have access to) I have confirmed that you need to open the
CADPTS.DAT file as the layer and this should automatically pull in the HDF5
data. This is because you need the mesh positions and topology to represent
the mesh data - contained in the .DAT files - as well as the attribute data
contained in the hdf5 file.

you can see a screen grab of the test data in this picture
<https://drive.google.com/file/d/1XU7nY7T4Tc0PTlWBf6Cr5CxI4NGFeMu_/view?usp=sharing>

On Wed, 4 Oct 2023 at 13:33, Maria Ramikh <mramich200130 at gmail.com> wrote:

> I use the FLO-2D plugin and I read that to open some output files hdf5 i
> need the MDAL library. When I try to open hdf5, QGIS writes this file is
> not a valid or recognized. I downloaded the MDAL library via conda, but
> nothing has changed. I have new a version of QGIS 3.28.11.
>
> вт, 3 окт. 2023 г. в 14:56, Paul Harwood <runette at gmail.com>:
>
>> Sorry - I just read your email correctly. You said "HDF5 files are still
>> not readable in *QGIS*".
>>
>> The conda installation does not add MDAL to QGIS - MDAL is actually built
>> into QGIS at compile time.
>>
>> Your problem must be something to do with the QGIS environment. I don't
>> think that Conda can fix that.
>>
>>
>> What do you mean by hdf5 files are not readable? What layer format are
>> you trying and what is the error?
>>
>> On Tue, 3 Oct 2023 at 08:38, Paul Harwood <runette at gmail.com> wrote:
>>
>>> You don't have to do anything else, it should work.
>>>
>>>
>>> What is the error you are getting?
>>>
>>> On Tue, 3 Oct 2023, 06:32 Maria Ramikh via MDAL-Developer, <
>>> mdal-developer at lists.osgeo.org> wrote:
>>>
>>>> Hello! I installed the package using conda "conda install -c
>>>> conda-forge mdal", but hdf5 files are still not readable in QGIS. After
>>>> installing in conda, do I have to do something else?
>>>>
>>>>
>>>>
>>>> --
>>>> Maria Ramikh
>>>> _______________________________________________
>>>> MDAL-Developer mailing list
>>>> MDAL-Developer at lists.osgeo.org
>>>> https://lists.osgeo.org/mailman/listinfo/mdal-developer
>>>>
>>>
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