I've tried looking through the source code, but there doesn't seem to be support for this in MetPy. For example, I have a set of wind vectors relative to the Earth coordinate system (speed, direction) which I want to transform to (u,v) relative to a grid on a Lambert Conformal projection.
1 Answers
MetPy doesn't handle the coordinate system transforms, it lets CartoPy handle that. It does support converting speed and direction to components. So you would want to do:
import cartopy.crs as ccrs
import metpy.calc as mpcalc
proj = ccrs.LambertConformal()
u_earth, v_earth = mpcalc.wind_components(speed, direction)
u_grid, v_grid = proj.transform_vectors(ccrs.PlateCarree(), lon, lat, u_earth, v_earth)
Using PlateCarree as the source projection for the components tells CartoPy that the coordinates and components are lon/lat and earth relative.
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