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Incorrect collocation for decreasing latitude coordinate #26

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duncanwp opened this issue Jan 17, 2020 · 0 comments

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duncanwp commented Jan 17, 2020

Given a cube with a decreasing latitude (Dim) coordinate Gridded to Ungridded collocation gives incorrect values. The following can reproduce this:

clwc=cis.read_data('test.nc', 'clwc')
points = hyperpoint.HyperPointList([hyperpoint.HyperPoint(lat=-25.8,
                                        lon=-19,val=0)])
res_cis = clwc.collocated_onto(ungridded_data.UngriddedData.from_points_array(points), missing_data_for_missing_sample=False)
assert res_cis[0].data[0] == 0.16651

Using the attached test file.

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