How to make a color-map from lat long and data.

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TAPAS
TAPAS am 25 Apr. 2020
Kommentiert: Ameer Hamza am 26 Apr. 2020
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.
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Ameer Hamza
Ameer Hamza am 26 Apr. 2020
Is the data in excel file only corresponds to colormap or the background image too?

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Ameer Hamza
Ameer Hamza am 26 Apr. 2020
Bearbeitet: Ameer Hamza am 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 Kommentare
Ameer Hamza
Ameer Hamza am 26 Apr. 2020
You can try to plot it over the .grd file by using hold on.
Ameer Hamza
Ameer Hamza am 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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