Fix derivation of correct radius of influence when data layout is not standard #555
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…e 'y' dimension for rows/scanlines This makes the code resillient towards any other (awkward) data layout than the standard (where first dimension is usually the rows. Signed-off-by: Adam.Dybbroe <a000680@c21856.ad.smhi.se>
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It looks like I can assume that |
For Satpy, yes, but we can't (and shouldn't) make that assumption for pyresample. |
Ok, got me there then! I was looking for tests on that, but found only with xarray, but possible that I just overlooked such tests... |
Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## main #555 +/- ##
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+ Coverage 94.11% 94.14% +0.03%
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Files 82 84 +2
Lines 13078 13199 +121
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+ Hits 12308 12426 +118
- Misses 770 773 +3
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Signed-off-by: Adam.Dybbroe <a000680@c21856.ad.smhi.se>
pyresample/geometry.py
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| @@ -28,6 +28,7 @@ | |||
| from typing import Optional, Sequence, Union | |||
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| import numpy as np | |||
| import xarray as xr | |||
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This makes xarray a hard requirement on pyresample which it is not. Plus DataArray is already imported in a try/except below.
pyresample/geometry.py
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| # Data have no information on dimensions, so we assume first dimension (the rows) is the y-axis: | ||
| logger.warning('As Numpy data arrays carry no information on the data layout we here ' + | ||
| 'assume the first dimension (the rows) is the y-axis (the satellite scans)') | ||
| rows = self.shape[0] |
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So users get a warning for every execution of this method? No, we can't do this.
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warnings.warn would in theory only issue a warning on the first execution.
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Lol right, sure, but the overall point still stands. I would still prefer that users receive no warning for a usage that has existed for years and years and is perfectly fine in 99.9999% of cases that we run into.
My preference is still that the Satpy reader reorient data, but I also have no experience with that instrument.
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Ok I take back the "years and years" thing, I thought this was a different method being modified...but still.
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I agree that in this particular case, there should be no warning at all.
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Ha, very good, I did trigger a reaction here! I was pretty sure you wouldn't like this when I wrote it, but wanted to discuss it. Done now. So sorry, I take it back again.
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Ha, very good, I did trigger a reaction here! I was pretty sure you wouldn't like this when I wrote it, but wanted to discuss it. Done now. So sorry, I take it back again.
Signed-off-by: Adam.Dybbroe <a000680@c21856.ad.smhi.se>
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@djhoese I made a comment in the issue: #554 (comment) Which solution do you propose I pursue? And does @gerritholl and @mraspaud have opinions as well? |
This is supposed to solve #554
Make use of the fact that longitudes are an xarray data array and use 'y' dimension for rows/scanlines
This makes the code resilient towards any other (awkward) data layout than the standard (where first dimension is usually the rows).
git diff origin/main **/*py | flake8 --diff