MATLAB: Using worldmap in 0 to 360 longitude

Question

I am trying to plot rainfall data as a contour plot over a worldmap. The problem is that the data is in 0 360 longitude and the world map comes out half blank because that is in the 180 -180 longitude system. Changing my longitude to this system using longi=mod((longi+180),360)-180; is not working as the contours stretch out from the leftmost end to the rightmost end across the map. To avoid this I will need to rearrange the data in the matrices which is resource intensive. Is there a way I can simply plot the world map into the 360 degree system. I am using R2008b and the worldmap function is geoshow('landareas.shp', 'FaceColor', 'None')

Thanks PK

Answer 1

Instead of using worldmap, use axesm to manually create an axis with the limits you want:

 % Some fake data
 data = peaks(50);
 lat = linspace(-90,90,50);
 lon = linspace(0, 360, 50);
 % Plot the map
 axesm('robinson', 'maplonlimit', [0 360], 'frame', 'on');
 geoshow('landareas.shp', 'facecolor', 'none');
 contourm(lat, lon, data);