[ncl-talk] lat,lon not accurately generated by NCL

[Craig Mattocks]

See this note about the dangers of transforming between geocentric (spherical) and geodetic (ellipsoidal) coordinate systems (especially the difference in latitudes):

http://www.pkrc.net/wrf-lambert.html#_footnote_2

Transform from Lambert conic conformal to spherical lat,lon first to avoid errors.

Note: I believe NCL uses proj.4 for map projections.

We’ve been fighting a similar issue in AWIPS II.

Craig

On Mon, 30 Jul 2018 12:32:22 -0600, Guoqing Ge - NOAA Affiliate <guoqing.ge at noaa.gov> wrote:

> Recently, I found an issue on the generation of grid meshes using a
> prescribed map projection information.