Re: rotated lon/lat script

From: David Brown <dbrown_at_nyahnyahspammersnyahnyah>
Date: Mon Oct 10 2011 - 17:31:32 MDT

Hi Yongzuo,

Sorry to take so long to get back to you. We seem not to have a decent example of a rotated lat/lon map projection. However, here is one I have cobbled together using GRIB 2 data. A couple of points to note:
1) The GRIB data gives the lat/lon of the rotated southern pole. NCL needs you to set the center lat and lon. The longitude can be used as is, but you need to add 90 to get the center latitude.
2) This data has the Y-Axis going from North to South, so it must be reversed, at least for a native-projection plot, both when setting the corner latitudes and by using the trYReverse resource to indicate a reversed Y-Axis.
3) The first frame draws the plot in its native projection. The second plots it in a "regular" (non-rotated) lat/lon projection.
 -dave

On Oct 2, 2011, at 10:52 PM, Li, Yongzuo wrote:

> Hi,
>
> Does anyone have a example script for rotated
> longitude and latitude map projection?
>
> Thanks.
>
> Yongzuo
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Received on Mon Oct 10 17:31:40 2011

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