Survey Size:
NPRA Survey
5,000 square miles; approximately 4,000 stations acquired by helicopter with inertial surveying; approximately 10,000 stations (public data)
Data Spacing:
5,900 foot grid
Terrain Corrections:
Through Hayford-Bowie Zone J
Data Provided:
- Magnetic tape and computer printout containing all principal survey facts including: station number, date surveyed, latitude, longitude, UTM X-coordinate, UTM Y-coordinate, elevation, terrain correction, station gravity, free-air gravity, and Bouguer gravity calculated for three densities.
- Both the helicopter-acquired data and the publicly available data have been terrain corrected and integrated
- Report describing data acquisition and reduction
- Bouguer Gravity Map at a scale of 1″ = 8,000′; station location map. Gravity data are tied to the Worldwide Defense Mapping Agency base station gravity network
Total Cost:
Please contact for quote
PDF: G1062_ak_npra_survey