Question about psxy -Sf option

Q&A
1

Hi to all,

I need to plot some fault data with -sf option. my dataset contains some syncline fault and I want to show it by the inverted triangles in Sf case. I have uploaded some sample png to show what my codes done and which type of triangle that I need.
In other words, I want to use -sf with t however, triangles should be inverted same as the figure attached.

Here is my code:
“”"
gmt psbasemap -JM18c -R33.7/33.9/38.33/38.4 -BWESN -Bx0.1 -By0.1 -K -Y6.37 -P > $ps
gmt pscoast -Df -I3/0.25p,blue -W0.25p,black -I1/0.25p,blue -R -J -Glightbrown -Slightskyblue -O -K >> $ps

gmt psxy syncline.gmt -R -J -Sf0.4c/0.04+t0.3c+o0.11c -W1.0,100/0/150 -G100/0/150 -O -K >> $ps

“”"

triangles_that_i_need
my_codes_result

2

It is a good point. For whatever reason we did not consider inverted triangles. I have now added this to GMT and we are awaiting approval and merging.

3

Dear Dr. Wessel,

Thanks for your quick reply. I think it is a very useful update to plotting syncline folds. Because, the inverted triangle is the general symbol for that fault. Thanks again.

4

Now merged into master. So if you build from source you can get to this now, or wait for 6.3.0 hopefully next week.