[ncl-talk] rcm2points and datums

[sam.hawkins at vattenfall.com]

I have a question about RCM2points and datums.  I often use rcm2points to interpolate WRF output latitudes and longitudes.  However, as I now realise,  WRF uses a spherical datum, whereas I have been supplying wgs1984 latitude and longitude as the points to interpolate to.   In this case the results could be different by several kilometres in mid-latitudes.  Can anyone confirm this is the case? And if so, would it be possible to add  a warning to the docs that  you should ensure that you supply all your latitudes and longitudes in the same datum.   I think this oversight is very widespread - not a fault of NCL.


Sam Hawkins
Senior Research Engineer
Vattenfall Wind Power Ltd
sam.hawkins at vattenfall.com<mailto:sam.hawkins at vattenfall.com>
+44 (0)7966 691026


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