libkml: libkml (KML library) libkml: libkml: libkml is Google's reference implementation of OGC KML 2.2. It also libkml: includes implementations of Google's gx: extensions used by Google libkml: Earth, as well as several utility libraries for working with other libkml: formats. libkml: libkml: libkml: libkml: libkml: