The ability to augment local gravity surveys with additional gravity stations from easily accessible national databases can greatly increase the areal coverage and spatial resolution of a survey. It is, however, necessary to integrate such data seamlessly with the local survey. One challenge to overcome in integrating data from national databases is that these data are typically of unknown quality. This study presents a procedure for the evaluation and seamless integration of gravity data of unknown quality from a national database with data from a local Global Positioning System (GPS)-based survey. The starting components include the latitude, longitude, elevation and observed gravity at each station location. Interpolated surfaces of the complete Bouguer anomaly are used as a means of quality control and comparison. The result is an integrated dataset of varying quality with many stations having GPS accuracy and other reliable stations of unknown origin, yielding a wider coverage and greater spatial resolution than either survey alone.
Study Area
Additional publication details
Publication type:
Article
Publication Subtype:
Journal Article
Title:
Integrating stations from the North America Gravity Database into a local GPS-based land gravity survey
Series title:
Journal of Applied Geophysics
DOI:
10.1016/j.jappgeo.2012.11.011
Volume:
89
Year Published:
2013
Language:
English
Publisher:
Elsevier
Contributing office(s):
Center of Excellence for Geospatial Information Science (CEGIS)
and Paul R. Stoddard