Read and work with tif DTM

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Eitan Cartier
Eitan Cartier le 23 Avr 2018
I'm using Matlab 2017a with Mapping Toolbox. I have a DTM (elevation of terrain shown a gray scale) as a .tif file (the file was produced using arcMap so it contains all the geographical data needed), I tried using the geotiffread function to read the file and then use the geoshow but I keep getting an error that "Valid colormaps must be nonempty, double, 2-D matrices with 3 columns"
I've tried following the help for geotiffread & geoshow, and the example shown but I just keep getting the same error
What am I doing wrong? I also tried: 1. using the mapshow 2. converting the data to double from single

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