NOAA > NCEI (formerly NGDC) > Geomagnetic Data & Info > HDGM Home
This website is being retired. Please check out our new website here https://www.ncei.noaa.gov/products/high-definition-geomagnetic-model
HDGM Current License Holders
Altitude Energy Partners
Baker Hughes
Halliburton
KLX Energy Services
Leam Drilling Systems LLC
Patterson-UTI
ProDirectional
roundLab Inc.
Schlumberger
Scientific Drilling
Shell
Southwestern Energy
Total Directional Services, LLC
Weatherford
Xcalibur Multiphysics