With offices in Houston and San Antonio, Gravity Map Service provides a library of non-exclusive, high resolution gravity data for oil, gas and mining exploration. The Gravity Map Service data set includes extensive gravity data covering exploration areas of the U.S.A. Gravity Map Service was founded in the 1970's as a division of Neese Exploration Company founded in 1952 by Urban Neese. The mission of GMS is to provide high quality geophysical data and service to enhance exploration programs for our clients.