M_map file with contourf

21 views (last 30 days)
Hi all,
I am using M_map to create a figure of Indonesian waters. As you can notice on the figure below (too heavy to upload as matlab fig...), the waters with a depth below 1000 m are in white. I would like to have the water below 1000 in darblue then a decrease of colour for shalower water as presented on hte legend. I think it has something to do with contourf but I tried different code and i am stuck... Can someone help me please?
% add path to matlab functions:
addpath ('C:\Matlab_download\m_map1.4\m_map\');
% Coordinates of all Indonesia
% 'lon',[90 146.64],'lat',[-12 14.15]);
m_proj('lambert','long',[90 146.64],'lat',[-12 14.15]);
[CS,CH]=m_etopo2('contourf',[-1000:100:0 ],'edgecolor','none');
m_gshhs_f('patch',[.7 .7 .7],'edgecolor','none');
caxis([-1000 000]);
[ax,h]=m_contfbar([.55 .75],.8,CS,CH,'endpiece','no','axfrac',.05);

Accepted Answer

Bjorn Gustavsson
Bjorn Gustavsson on 31 Aug 2022
You might get away by modifying the colormap with the brighten function, perhaps something like:
This should change the colours giving a more blue (if I got it right) appearance than the default m_colmap('blues') give. You could also directly modify that colourmap as you see fit:
mblues = m_colmap('blues');
mblues = mblues.^4; % any modification you see fit that leaves the values between 0 and 1...
Bjorn Gustavsson
Bjorn Gustavsson on 31 Aug 2022
Then perhaps you shouldn't limit contourf to -1000, so maybe this:
[CS,CH]=m_etopo2('contourf',[-10000,-1000:100:0 ],'edgecolor','none');
% -10000 should be safe to include all deeper parts?

Sign in to comment.

More Answers (0)


Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by