How to make a color-map from lat long and data.
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I have an excel file which has 3 coloumns longitude,latitude and data.I want to make a colormap.How can I do that.I am attaching the data file and a picture which shows what I want to do.
1 Comment
Ameer Hamza
on 26 Apr 2020
Is the data in excel file only corresponds to colormap or the background image too?
Accepted Answer
Ameer Hamza
on 26 Apr 2020
Edited: Ameer Hamza
on 26 Apr 2020
try this
data = readmatrix('data.xlsx');
lat = data(:,1);
lon = data(:,2);
val = data(:,3);
latV = linspace(min(lat), max(lat), 100);
lonV = linspace(min(lon), max(lon), 100);
[latG, lonG] = meshgrid(latV, lonV);
valG = griddata(lat, lon, val, latG, lonG);
contourf(latG, lonG, valG, 100, 'LineColor', 'none')
colormap(jet)
colorbar
4 Comments
Ameer Hamza
on 26 Apr 2020
You can use this package to read .grd file: https://www.mathworks.com/matlabcentral/fileexchange/25683-grdread2 and read the discussion here to see how to plot it: https://www.mathworks.com/matlabcentral/answers/446756-plot-grd-file.
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