Worldmap plot with data

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SOFIA DARMARAKI 2015-6-17

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https://ww2.mathworks.cn/matlabcentral/answers/224205-worldmap-plot-with-data

评论： SOFIA DARMARAKI 2015-6-19

Hello!!I am a very beginner in Matlab and I am trying to make the contour of temperature anomaly data that are in a 4D matrix(longitude,latitude,month,year) with a world map on the background. The problem is that the longitude of these data goes from 0-360 and matlab world maps usually go from -180 to 180. Is there an effective way to make the coastline going from 0-360, using the latitude and longitude data that i have and not the default ones??Im using a 2014b Matlab. I was also trying to find a way to do that with the Map_M toolbox of Matlab but i could not change it.Is there maybe a way through it??Thank you in advance!

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Answer 1

Andrew Schenk 2015-6-18

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https://ww2.mathworks.cn/matlabcentral/answers/224205-worldmap-plot-with-data#answer_183191

编辑：Andrew Schenk 2015-6-18

在 MATLAB Online 中打开

The code below will create a map axes, set the longitude limits to 0 to 360 and plot the coastlines on the map. Note that the Meridian Labels will now display as 0 to 360 E.

    %create the map axes. See http://www.mathworks.com/help/map/the-map-frame.html
    axesm('MapProjection','robinson',...
         'MapLatLimit',[-90 90],'MapLonLimit',[0 360], ...
        'Frame','on','Grid','on', 'MeridianLabel', 'on', 'ParallelLabel', 'on')
    %load the coast data and plot. See http://www.mathworks.com/help/map/create-a-world-map.html
    load coast
    [latcells, loncells] = polysplit(lat, long);
    numel(latcells)
    plotm(lat, long)

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SOFIA DARMARAKI 2015-6-19

Thank you very much for that answer!!It seems to work. But when i try to extract a certain area e.g Mediterranean with longitude area from -11 to 37 and latitude area from 29 to 50 i can't really have a result.I can't locate the exact pixel location of these values for longitude and latitude.

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