Access grid information from a vertex-grid (disV)

[DStrom1987]

Hi,

I have browsed the forum and the flopy documentation to no avail...

I'm trying to access the grid information of a pre-generated vertex grid (by modelmuse).

I figured the flopy.utils.gridgen.get_gridprops_disv() should be useful for this, but for whatever reason I'm not succeeding in importing the grid properties.

I did try to follow the steps in this example:
https://flopy.readthedocs.io/en/latest/Notebooks/modelgrid_examples.html

From what it seems it needs to generate or import a normal dis-grid and insert a refinement after.
But what if i want to access the modelgrid class and the grid properties/domain directly from a .disv-file generated outside of the code?

Can it be done?

edit: By the way. Running the following code

`# load a modflow-6 simulation
sim = flopy.mf6.MFSimulation.load(sim_ws=tmp_d, verbosity_level=0)

get a model object from the simulation

m = sim.get_model("mod0000")

access the modelgrid

modelgrid = m.modelgrid()`

gives me this error

---

AttributeError Traceback (most recent call last)
Cell In[10], line 8
5 m = sim.get_model("mod0000")
7 # access the modelgrid
----> 8 modelgrid = m.modelgrid()
10 m.dis.top.plot()

AttributeError: 'NoneType' object has no attribute 'modelgrid'

Sincerely
David

[wpbonelli]

You can load a vertex grid directly from a binary grid file. Alternatively, you can load a simulation with MFSimulation.load() per usual, then retrieve the modelgrid from a model as you describe in your edit.

The error you are seeing indicates no model was found with the provided name. In this case flopy returns None from get_model().

[DStrom1987]

Thanks for the advice.

When I try to access the information with the classmethod described i get the following error:

Any idea of whats going on? I have tried with a "known" working disv-grid from the examples to make sure its not my input-file that is the problem.

[wpbonelli]

Without your grid file it's hard to diagnose. It looks like it's not a DISV grid but a regular DIS. Note the same from_binary_grid_file() method is available on StructuredGrid as well, does that work?

[DStrom1987]

Turns out it was using the non-updated file from a temp dir. Seems to be working now! Thanks!