[Qgis-user] Storing Irregular Mesh and Simulation Data for QGIS

[Richard Duivenvoorde]

Hi Lilas,

In my bubble we use NetCDF for that.

First the NetCDF-CF convention (regular grids + time dimension): http://cfconventions.org/

But now the UGRID convention http://ugrid-conventions.github.io/ugrid-conventions/
adding irregular grid functionality

QGIS (via MDAL) is pretty good in (fast) visualising this using the Temporal Controller.

Some example data in the test directory of the MDAL code:
https://github.com/lutraconsulting/MDAL/tree/master/tests/data/ugrid

Some hurdles:
- netcdf is pretty loose in it's definition: sometimes it is hard to get the file format right
- loading/styling a mesh in QGIS involves a lot of steps
- QGIS still has some small issues, my main one: always missing the last timestep :-) but there are more (like not handling negative time steps ...)

I do have some python code laying around for a simple plugin, which 'just load and visualizes' a netcdf (based on some color ramp txt files. Let me know if you would be interested in that.

HTH & Regards,

Richard Duivenvoorde


On 22-01-2025 11:18, Lilas Bugeau via QGIS-User wrote:
> Dear all,
> 
> 
> I am currently working on a project and I have a question about the file format I should use so that I can open it in QGIS.
> 
> 
> Specifically, I need to store data from an irregular mesh and the results of a hydrological simulation on that mesh in a binary file.
> 
> My main requirement is that the file format should allow me to visualize both the mesh and the simulation results in QGIS, including the use of the temporal control panel. So I need to store all the time steps from the simulation within the file.
> 
> If anyone has experience with a suitable file format or can point me to resources or solutions for this, I’d really appreciate it.
> 
> 
> Thank you in advance for your time and assistance.
> 
> 
> Best regards,
> 
> 
> Lilas Bugeau
> 
> 
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