I am new to the GMT and I have to plot the colorful contours to show my data. I am using grdimage for contouring the map the circle with 200 km radius is drawn using following command
gmt psxy Site.txt $LIM $Proj -Sc -SE-400k -W1p,white.
I think it is not an efficient way but unfortunately, I do not know any other way.
Can anybody please help me how to clip/trim/cut data outside the circle? should only show the contours inside white circle.