Integrating stations from the North America Gravity Database into a local GPS-based land gravity survey

► Web site gravity data of unknown quality are integrated into local GPS-based survey. ► Each station of the integrated dataset meets prescribed accuracy criteria (seamless). ► The integration yields increased resolution and areal extent from the original survey. ► Quality control parameters monitor each step of the integration procedure. ► Interpolated cBa surfaces are compared to establish the utility of this method.