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Plotting contour line and filling contours for coastline Island data?
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My aim is to plot contour lines and fill these contour lines in using the function contourf. In order to show the area of the Island which would theoretically be safe to live on/ would be above sea level if the sea level were to rise.
I have tried numerous ways to attempt the above task but with great difficulty and have not succeeded. At present I have been able to plot a gray shaded relief map of the Island but cannot seem to get the coastline data not filled contours onto the map.
Assistance would be greatly appreciated.
The coastline data, and a picture of the ideal similar map that I want matlab to produce are also attached.
The attached map example if for temperature wheres as my plot will be for topographic elevation in relation to sea level rise for a different Island. Thanks
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Accepted Answer
Chad Greene
on 21 Nov 2014
Edited: Chad Greene
on 21 Nov 2014
I did not open the hgt file you posted because I'm unfamiliar with that format.
Below I make the ocean blue, 0 to 5 meters elevation is bright red, and everything above 5 m is forest green. Below I use rgb for the color values, but you could get those values any way you wish.
[lat,lon,z] = peaks;
z = 20*abs(z)-50;
SLR = 5; % meters sea level rise
mycolors = rgb('ocean blue','bright red','forest green');
contourfcmap(lon,lat,z,[min(z(:)) 0 SLR max(z(:))],mycolors)
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