[gdal-dev] Get max elevation on "squares"

[Luca Bertoncello]

Hi list!

I'm very new to GDAL, so please excuse me if the question is too simple...

My problem: I'm writing an App to fly VFR and I'd like to display a
vertical profile of the route.
Of course, it must work offline, so I cannot use a service like Google
Maps or similar...

I tryed OpenTopoData with the EUDEM dataset and I can get the elevation
from a single point.
Very nice, but not useful for my App...

Since I don't need a huge precision, but I do need a relative small file
to use in my App, it may suffice if I can create a database with the
maximum elevation in a square 5x5 km, identified by the coordinates of
the center.

And here start the problems, since I don't have any idea how to extract
these data from the TIFF files I have.

On the server (Debian 10) is Python and PERL installed, as well as the
GDAL utilities.

Can someone help me?

Thank you very very much for your help!
Luca Bertoncello
(lucabert at lucabert.de)