GLB file is a GIS document used by Systems Tool Kit software. GLB file contains a globe, that is a 3D model of given terrain. Globes are used to simulate and analyze land, space, sea, and air objects. The projects is actively developed by engineers form AGI.

GLB files can be viewed and edited offline using Globe Manager STK tool or online using Globeserver service. Globes can be shared online with other users.