MDAL API

[FLO-2DKaren]

Study the MDAL library and GitHub Repository. Learn how to build a MDAL API

[FLO-2DKaren]

We will modify this with subtasks as we learn more about the MDAL libraries.

[FLO-2DKaren]

@rpachaly

Study the API documentation to see how we can apply this.

https://www.mdal.xyz/api/python_api.html#python-api

[FLO-2DKaren]

Learn about MDAL https://github.com/lutraconsulting/MDAL

Search this repo for flo2d.

[FLO-2DKaren]

How to use the current MDAL tools https://www.youtube.com/watch?v=rLnPxCkiahw&list=PLkT3KNZwX6zkEAJ_4qB_57r0Id_9cWgPr&index=3&pp=gAQBiAQB

[rpachaly]

I'm trying to find the best way to map FLO 2D results to QGIS. I'm going to write down some of my findings here just for documentation purposes.

1. Meshio (https://github.com/nschloe/meshio) - This library allows us to use many kinds of mesh and, using the MDAL-api, convert it to a mesh file that MDAL understands. Then, we can use QGIS to map the results.

• Pros: We can choose the type of mesh that we want.
• Cons: I don't know how good is the MDAL-api to convert a meshio object to a MDAL mesh. According to MDAL-api, "This integration is beta at the moment." We could spend a lot of time connecting our output data to a mesh file and it could not work.

2. Animating Time Series Data (https://www.qgistutorials.com/en/docs/3/animating_time_series.html). We need to create a shapefile containing all data series and then use the QGIS Temporal Controller.

• Pros: It is easy to implement.
• Cons: The files are going to be huge and I think it is going to crash often.

3. Ply: It does not allow time-dependent data.

4. NetCDF: We can add out output data to a NetCDF format and then open on QGIS as a mesh.

• Pros: The file size is small. It is currently working just fine on QGIS with example data that I've found. There is a python library that can handle this kind of data.
• Cons: We need to figure out how to add our output data to the NetCDF file. I'm going to give it a shot.

[FLO-2DKaren]

@rpachaly I'm going to provide some simplifying notes here.

1. Let me look into this a bit. I'll give you some better feedback once I have a chance to review a few things.
2. Let's not worry about the animation stuff right now because it works well with the general MDAL tool and I don't anticipate changing anything in the near future. I think we can ask Noemi to help us by adding the Max and Min Values to the timedep.hdf5.
3. If we can use NetCDF, we can use hdf5. It's just a matter of figuring out the setup. We want to keep our output in hdf5 because that is what our District Team is using.

[rpachaly]

Ok!

In the meantime, is there anything else that I can be doing? Otherwise, I'll look into the issues to see if I can start working on something.

[FLO-2DKaren]

Let me add some stuff to the project list.