usage of -i option with psxy
Cyril Langlois <[email protected]>
| Newsgroups | gmane.comp.gis.gmt.user |
|---|---|
| Message-ID | <[email protected]> |
Hello,
I’ve tried to map with GMT5.1.0 the seamounts database Global_Seamounts_JGR2001_revised.txt published by Paul Wessel in 2001, with seamount radius as symbol size.
So, using awk, I write :
awk '{if((substr($1,1,1)!="#")&&(substr($1,1,1)!=">")&&($1!=""))print($1,$2,0.0025*$6)}' Global_Seamounts_JGR2001_revised.txt |\
gmt psxy -R -J -Scc -Wthinner,black -Gfirebrick -O -V >> $map
It works (attached map below).
Reading the GMT5.1.0 manual, I believed I could do the same without awk, with the psxy -i option, choosing longitude (1), latitude (2) and seamount size (6th) columns of the file and resizing seamount radius. So, I write :
gmt psxy -R -J -Scc -i1,2,6s0.025 -hi -Wthinner,black-Gfirebrick -O -V >> $map
but it doesn’t work : data symbols are not plotted with the expected size nor at the good location.
Where am I wrong ?
Thanks for help,
Cyril
Dr. Cyril LANGLOIS
Professeur agrégé - enseignant de Sciences de la Terre
[email protected]
Tél. portable : 06 89 05 68 22
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