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[python #KMV-811594]: Absolute momentum calculation problem(metpy)


Apologies for the delayed response. Did you ever manage to work around the 

If not can you send me your code and the data file (or point me to where you 
got it)? The cross-section code assumes it can identify the x and y 
coordinates, so it's likely some missing metadata.


> I use the advanced interpolation of xarray to calculate cross-section,and I
> put the cross section U,V into metpy.calc.absolute_momentum(u_wind, v_wind,
> index='index'),but it doesn't work.
> U V array is geostrophic wind.
> The ERROR message:
> File "F:\Anaconda3\lib\site-packages\metpy\calc\cross_sections.py", line
> 125,
> in unit_vectors_from_cross_section
> x, y = distances_from_cross_section(cross)
> File "F:\Anaconda3\lib\site-packages\metpy\calc\cross_sections.py", line
> 36, i
> n distances_from_cross_section
> if (CFConventionHandler.check_axis(cross.metpy.x, 'lon')
> File "F:\Anaconda3\lib\site-packages\metpy\xarray.py", line 100, in x
> return self._axis('x')
> File "F:\Anaconda3\lib\site-packages\metpy\xarray.py", line 77, in _axis
> raise AttributeError(axis + ' attribute is not available.')
> AttributeError: x attribute is not available.

Ticket Details
Ticket ID: KMV-811594
Department: Support Python
Priority: Low
Status: Closed
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