how to color specific part in the global map?

Hi everyone,

Is there is any way to create a map similar to the attached one? But coloring the Red Sea 'for example' instead of coloring lands?

I would appreciate any help.

Thank you very much

[darova]

How do you want to color it? Do you have coordinates or using mouse?

[Lilya]

yes i will give the coordinates

min_map_lon = 32;

max_map_lon = 45;

min_map_lat = 12;

max_map_lat = 30;

[darova]

Any ideas? How to re-scale coordinates to pixel position? Are those areas you want to color separated?

[Lilya]

yes this box is what I want to color differently

[Image Analyst]

Do you have a digital image? Like a matrix of numbers saying whether a pixel is land or sea? If so, do you have a look up table or formula saying what latitude and longitude each pixel has?

[Lilya]

I do have the matrix of the Red Sea location