Precipitation Data with latitude and longitude showing up sideways
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I downloaded precipitation data from the TRMM satellite for a specific region of Africa. The precipitation data downloaded as a 60x100 matrix. Each pixel represents 0.25 degrees of latitude/longitude. The longitude range is from 10 to 25 (at 100 pixels) and the latitude range is from -30 to -5 (60 pixels). However, when I plot the data using imagesc, the data is flipped. It looks like Africa fell over to the right. I have tried transposing the matrix into a 100x60 matrix using the transpose function but that messes up the data even further.
This is how I downloaded the precipitation data from the HDF file
precipitation(:,:)= hdfread(filename, '/Grid/precipitation', 'Index', {[1 1],[1 1],[60 100]});
This is the code I used to create the latitude and longtidue vectors:
gridSize=0.25; % arc degrees
lat=-30+(gridSize/2):0.25:-5-(gridSize/2);
lon=10+(gridSize/2):0.25:25-(gridSize/2);
[lonGrid,latGrid]=meshgrid(lon,lat);
This is the code I used to plot my data:
imagesc(lon,lat,precipitation(:,:,1))
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Answers (2)
Hitesh Bugata
on 12 Jun 2020
Use Panoply by NASA to visualize netCDF files. It is easy to use.
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James Karden
on 14 Dec 2020
Try this
flip_data = data';
This should flip it on its side for you and be right!
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