How to put color on the topography map so that background topography will be shown

Q&A
1

Hii, experts, I have made a gmt topography basemap, now i need to put some color on the map so that the background topography should be shown as attached here https://i.fluffy.cc/XldTpqdd06nrMvzmXqPcVrwx527JX0pF.html Can anybody suggest some example scripts or some idea on that

2

That is just plotting some colored polygons with transparency so the shading from the base relief shows through.

3

Thanks for your reply.However as per your suggestion i have selected an area and i put the red color on that by -Gred@50 but there is no changes …the red color filled up in the selected area and does not show the background topography what i actually want.Can you please provide some example lines of code that can do this job done.

4

You are doing it right. A couple of suggestions for why it is not working:

  1. Transparency is only viewable if you convert the PostSCript to PDF or a raster. In PostScript it is all opaque.
  2. ghostscript has had a lot of bugs related to transparency. We are using 9.50 since any later and some of the earlier broke transparency. Another fix is coming in 9.53? this fall.
5

Thanks. I will check and get back to you soon.

7

Well, then your ghostscript is broken. What version are you using?

8

Thanks…it solved my problem.