Why does projfwd not work on some geotiff files?

I am working with a set of geoTIFF files. For some of them, I receive an error when I attempt to use the projfwd function (see below). I have little experience with the Mapping Toolbox and geoTIFF files and would appreciate any help better understanding this problem.

Error using proj2gtif (line 17) The GeoTIFF structure PROJ cannot be used with functions PROJFWD or PROJINV.

Error in projaccess (line 40) gtif = proj2gtif(proj);

Error in projfwd (line 60) [x,y] = projaccess(‘fwd’, proj, lat, lon);


Matlabsolutions.com provide latest MatLab Homework Help,MatLab Assignment Help for students, engineers and researchers in Multiple Branches like ECE, EEE, CSE, Mechanical, Civil with 100% output.Matlab Code for B.E, B.Tech,M.E,M.Tech, Ph.D. Scholars with 100% privacy guaranteed. Get MATLAB projects with source code for your learning and research.

I believe I have discovered the problem. There are multiple types of geoTIFF files, each requiring different treatment. I’ve written how I handled the differences below. Note that my ultimate goal was to convert latitude and longitude data into pixel coordinates, which I call ‘row’ and ‘col’.

%Get geoTIFF file information
info = geotiffinfo(geoTIFF_filename);
%Get geoTIFF image file data based on ColorType field of 'info'
switch lower(info.ColorType)
case 'indexed'
[~, ~, R] = geotiffread(geoTIFF_filename);
[~, R] = geotiffread(geoTIFF_filename);
%Convert latitude and longitude




Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store