I’ve been plotting some data that was preprocessed with blockmean and after plotting with grdview the images appear with a grid of white faint lines. Any idea of why this happens and how can i fix it?
Do you have -B[…]g[…] somewhere?
-Ba adds automatic annotations
-Ba10f add annotations every 10 units as well as automatic ticks
… and -Bafg also add gridlines
If this is not related to the -B option, then it might be due to antialiasing, see the
-n+a. Would help if you have a minimal example of the commands used.
gmt subplot begin 1x2 -M0.1c -Fs8c/0 -R28/43/-28/-10 -JM8c -SCb -SRl+t -Bwesn
gmt grdview block.nc -Ccontinuous.cpt -Qs -B+t"T2" -c0,1
gmt colorbar -Dx6.85c/4.35c+w4c/.18c+jTC+e -F+gwhite -Ccontinuous.cpt -B100g25
-B+tcontinuous -Bx -By+lmm
The -n+a option doesn’t seem to work with grdview, or should it be placed with some other command?
Thank you for the help.
@jrocha - indeed, the
-n+a doesn’t work in
grdview. Have you tried playing with the different
-Q options, such as
-Qi instead or testing the options mentioned in the Notes section of the grdview page? I’d guess that this is related to your original grid increment and the way
grdview is rendering the surface. Other than that I don’t know… sorry.
@chhei-s in fact i’ve changed -Qs to -Qi and the gridlines have disappeared, though there is a lack of resolution with -Qi or that’s the way the -Qi option looks like At least the lines are gone. Anyway i think i’ll try to re-grid with different increments to see how the output will look like.
Thanks a lot.