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plot irregularly gridded map data
| plot irregularly gridded map data [message #16621] |
Wed, 04 August 1999 00:00 |
Tom Spisz SRM
Messages: 1
Registered: August 1999
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Junior Member |
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<P>I have an irregularly gridded latitude/longitude data set. Although
the data is in a polar (radius, azimuth) format like a radar swath, I have
the exact lat/lon position for each point. I cannot plot the data
using map_image because that requires a regular grid. I used map_patch
successfully on small portions of the data. Unfortunately, any attempts
to plot larger portions of the data using map_patch result in the error:
<BR> % TRIANGULATE: Points are co-linear, no solution.<BR>
% Error occurred at: MAP_PATCH & amp;nbsp;
181<BR>
/usr/local/rsi/idl_5.2/lib/map_patch.pro<BR>
<BR>
<BR>Does anyone know:
<BR> a) how to plot this type of "radar swath" data onto a map?
<BR>or
<BR> b) how to sort the data in a way to work around the problem
of "co-linear" points?
<PRE>-- Tom Spisz
===============================
The Applied Physics Laboratory
The Johns Hopkins University
Bldg 4 Room 138
(240) 228-7260
(443) 778-7260
Tom.Spisz@jhuapl.edu</PRE>
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