rotation problem using MAPROJ

From: Rich Selin (selin@XXXXXX)
Date: Mon Jul 13 1998 - 17:31:08 MDT


NCAR Graphics users,

I'm having minor problems rotating my plot using the MAPROJ routine.
I set XC1 at -180. and XCM at 180. for vector plots, but would like
to center the map on an area of interest. I thought I could change
PLON in MAPROJ, to say 40., instead of 0. The vector field and map
seems to rotate correctly, but I see two columns of vectors closer
together than the other columns. As I rotate the map, the those two
columns move and are quite noticable. I assume these are the columns
at -180 and 180 when PLON is 0.

Am I explaining this correctly? Can I rotate the map this way?

The same thing happens when I contour, I get a small 'jag' in the
contours that rotates.

Thanks,

Rich Selin
Center for Climatic Research
selin@slonce.meteor.wisc.edu



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