The final image of the data is missing and has spaces

Hi

I have a problem, When I analyze the magnetic data, the final image appears to be missing some data, as there are gaps in the image. What could be the problem?

"I used this code:

gmt begin AS20 png

gmt grdclip AS.grd -GAS1.grd -Sa20/NaN -Sb0/NaN -V
gmt grd2cpt AS1.grd -Crainbow -H > color.cpt
gmt grdimage AS1.grd -JM16c -R33/39.5/22/27 -Ccolor.cpt
gmt coast -Df -Ba1f1 -W1 -Ggray
gmt colorbar -DjTR+o1.2c/0.5c -Ccolor.cpt -Bx1 -By+lnT/km -I

gmt end show
pause

However, there is a problem with the final result, as there are gaps in the image. What could be the problem?"

Hello @waleed, welcome to the forum.

Please provide examples (data & your result) so we can try to duplicate your result.

Also, please format your code as preformatted text. I did it for you in your post this time. In the future please use the </> option from the toolbar when writing your post.