Deltares / Deltares/imod-python

laplace_interpolate does not check x, y direction

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Description

In GitLab by @Huite on Oct 28, 2022, 18:12

Just had a report where imod.prepare.laplace_interpolate() used the ibound in a flipped manner in the y-axis.

This was caused by a reindex_like from xarray which does this. Since xarray doesn't really care about ascending or descending coordinates, we should generally check everywhere, including here.

Could be included in a broader thing where we try and do some more validation for all the utility functions.

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Research direction

Start at imod.prepare.laplace_interpolate and inspect how reindex_like handles x and y coordinate direction, especially the flipped y-axis case described in the report. Reproduce the issue with ascending and descending coordinates; done means the ibound is handled correctly and direction validation is covered.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
data
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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