[GIS] Convert Lat/Long to UTM specifying which zone to use (C++)

Question

I need to convert Latitude/Longitude coordinates into UTM, in C++, specifying which zone to use.

I am working with locations that fall in two zones, and would like to project them all into one zone – since they are not too far from the border, I am hoping the error introduced by doing so won't be too much.

So far I had been using Chuck Gantz's library, which converts LL to UTM, but it does not support conversion from LL to UTM specifying which zone to use.

Answer 1

You can use MSP GEOTRANS (The UTM class receives a UTM zone override parameter)

or GeographicLib (Use the SetAltZone method).