grdcontour:

Kristof Koch <[email protected]> Fri, 30 May 2014 10:49:32 +0200

Newsgroups	gmane.comp.gis.gmt.user
Message-ID	<[email protected]>

Dear List,

I'm trying to plot a single contour line. What unit is used here when the original data (comfix-limit.txt) for generating grddist.nc is a list of coordinates? I expected degrees but only got tiny little blobs on the resulting plot. The result I'm after is a contour line 300NM away from the coordinates given in comfix-limit.txt. As you can see I tried it with "5" as there are 60NM in 1° => 300NM. 

	grdmath -Rd -I0.1 -fg $WORK_DIR/comfix-limit.txt PDIST = "$STORAGE_DIR"/grddist.nc

	grdcontour \
		$STORAGE_DIR/grddist.nc \
		-J -R \
		-A+5+lVHF-Coverage+v+f6p,BellCentennialStd-NameNum,red \
		-Wa1.5p,red,1.5_1:0p \
		-K -O \
		>> $FILE


Any ideas what I'm doing wrong? The docs say: "[…] annotation interval [is] in data units […]". Running gmt 5.2.0_r13126 [64-bit]

All the best,
Kristof

--
My PGP Public Key: http://kristofkoch.de/pgp/


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