I am developing an AR iOS application. When the iPhone gets the current location, it has to calculate locally the visible point. I want to read the tiff files in my application, and then get the coordinates and altitudes from it.(locally, offline) I am looking for an open source C++ code, or something like this. Please help
With libtiff you can't get altitude from you file. I spent a lot of time trying to do it with libgeotiff. My advice is to install GDAL.
Libgeotiff should do the job.
I think you'll need CPL_DLL GTIFImageToPCS
and CPL_DLL GTIFKeyGet