How do I convert latitude and longitude to rows and columns on a geotiff?

I am trying to analyze a specific region of interest (ROI) on a very large geotiff. The image is from landsat 7. I want to input the latitude and longitudes of the top left and bottom right corners of the region I am interested in. I want to then use that data to find the rows and columns that I will be averaging.

I have tried to use functions such as latlon2pix. The pixel locations did not help me (the values I received didn't make sense). The setpostn function gives me errors.

Any help would be greatly appreciated!

Answer 1

[Chad Greene]

If latlon2pix returned funny numbers, I'd guess there's something wrong with your georeferencing matrix.

If you only need a small region of a Landsat image, geoimread may be all you need.

Answer 2

[Calvin Kielas-Jensen]

Thank you very much for the quick reply. I tried using that and unfortunately it does not seem to like the latitude and longitude values that I am providing. I will look through the code to see if I am missing something. This is proving to be quite a difficult problem for me.