Coordinate Conversion from XY in Satellite image to latitude and longitude

Question

Cyrus 2016-8-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/300486-coordinate-conversion-from-xy-in-satellite-image-to-latitude-and-longitude

评论： KSSV 2016-8-23

采纳的回答： KSSV

My associate and I are trying to convert XY Coordinates in a satellite image to latitude and longitude.

Here is the process:

We opened the image into Matlab using " geotiffread" function,

Did the process and found some XY Coordinates.

Now we need to convert back those [x,y] coordinates into latitude and longitude.

How can we do that? Thanks.

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Answer 1

KSSV 2016-8-23

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链接

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https://ww2.mathworks.cn/matlabcentral/answers/300486-coordinate-conversion-from-xy-in-satellite-image-to-latitude-and-longitude#answer_232521

在 MATLAB Online 中打开

file = 'Matlab_Question.tif' ;
info = geotiffinfo(file);
[x,y] = pix2map(info.RefMatrix,1,1);
[lat0,lon0] = projinv(info, x,y) ;
[x,y] = pix2map(info.RefMatrix,864,859);
[lat1,lon1] = projinv(info, x,y) ;

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Cyrus 2016-8-23

Thank you, that works, but I have one question about that,

As you know the size of the image is 865 X 859, I tried some indices out of the image of the boundary and Matlab didn't show me any error.

it that ok?

KSSV 2016-8-23

I think it can be checked... You can plot those values which are not the indices, with the indices which are from the image; check whether those points are really falling outside...

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