How to make a logical mask using a shape file?

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Devendra
Devendra 2024-3-26
评论： Image Analyst 2024-3-28
I am using following MATLAB code to create logical mask.
% Create a logical mask
[Z,R] = readgeoraster(img_file.name);
disp(R);
[lat,lon] = geographicGrid(R);
[Lon, Lat] = meshgrid(lon, lat);
logical_mask = reshape(isinterior(polygon, Lon(:), Lat(:)), size(Lon));
It is giving following erros
Incorrect number or types of inputs or outputs for function geographicGrid.
Error in ds_indices_caf (line 57)
[lat,lon] = geographicGrid(R);
I request to kindly suggest me how to do it correctly.
Dava

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回答（1 个）

Image Analyst
Image Analyst 2024-3-26
You have to define lat and lon as vectors before you use them in meshgrid to get the full matrices Lat and Lon as outputs.
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Image Analyst
Image Analyst 2024-3-28
I believe during the trial period you get free telephone help. Call them and work through it with an actual live person. I can't help you because I do not have that toolbox.

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