- I include dynmap binaries which I build myself. The code is not modified, but the binaries do omit a lot of code which I don't need, to make them smaller. Does this mean I need to provide access to the dynmap source code, or is it sufficient to refer to dynmap on GitHub?
- My code does include a handful of files copied from dynmap but heavily modified by me, mostly as glue to be able to invoke the dynmap code in ways it was never intended to. Are those files now GPLv3?
- Does the author of dynmap (Mike Primm) also retain copyright in the modified files? Should I list us both as copyright holders in those files? Should I list Mike as a copyright holder for the whole of WorldPainter? The files comprise a very small part of the code.
- Does any of the above imply that I should include a copy of the APLv2? Should I include a file explaining the situation with an overview of which license applies to which files? My estimation is that all the source code of WorldPainter proper, including the files copied from dynmap (since they are modified), is still GPLv3 and that it is therefore not necessary to include the APLv2. Is that correct?
I will of course give full credit, in the credits of the program and in the copied files. This is just about the technical situation regarding the licensing of the files and the resulting program as a whole.