pytroll / pytroll/pyresample

Deprecated use of pyproj.transform

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Dominant language
Python
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Description

Code Sample, a minimal, complete, and verifiable piece of code
pytest pyresample/test/test_geometry.py
Problem description

The usage of pyproj.transform has been deprecated. This function is used in pyresample.geometry.CoordinateDefinition.geocentric_resolution() and pyresample.geometry.SwathDefinition._do_transform() methods. The deprecation warning points to https://pyproj4.github.io/pyproj/stable/gotchas.html#upgrading-to-pyproj-2-from-pyproj-1 and the proper way in pyproj2 is to use pyproj.Transformer class.

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Research direction

Start with CoordinateDefinition.geocentric_resolution() and SwathDefinition._do_transform() in pyresample.geometry, then run pytest pyresample/test/test_geometry.py to observe the current deprecation warnings. Update the deprecated transformation usage to the pyproj.Transformer approach and confirm the geometry tests pass without those warnings.

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Assessment

Tech stack
python
Domain
data
Issue type
Refactor
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Clearly specified
Newbie friendliness
48/100

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