The Imeprial Galacographic Survey, run jointly by the Grand Library and the Department of Colonization, was the branch of the Imperial government reponsible for mapping the Galaxy, planetary systems, and the individual planets of the Empire.
The IGS also placed and maintained thousands of automated reference & navigational buoys throughout the Galaxy.
The IGS
maintained and published the Planetary Catalog, which was a complete
database of maps, surveys, and other geographic information about
the thousands of worlds, inhabited and not, which had come to
the attention of the Empire. The Planetary
Catalog was made available through the Grand
Library.