GEOID99

First created 10/01/1999. DAS.

Last updated 11/16/2000. DAS.

GEOID99 is a refined model of the geoid in the United States, which supersedes the previous models GEOID90, GEOID93, and GEOID96. For the conterminous United States (CONUS), GEOID99 heights range from a low of -50.97 meters (magenta) in the Atlantic Ocean to a high of 3.23 meters (red) in the Labrador Strait. However, these geoid heights are only reliable within CONUS due to the limited extents of the data used to compute it. GEOID99 models are also available for Alaska, Hawaii, and Puerto Rico & the U.S. Virgin Islands.

Information The Official NGS GEOID Page Readme file for GEOID99 Technical details Frequently Asked Questions Geophysics of the Geoid On-Line Papers The Geoid Research Page Acknowledgements Data Interactive GEOID99 computations Download PC version of GEOID99 Download Sun version of GEOID99 Download ASCII version of GEOID99 Order GEOID99 CD-ROM Related Pages GEOID03 USGG2003 G99SSS G99BM DEFLEC99 Images of data files used in GEOID99 GPS/bench mark data set in GEOID99 The NGSDEM99 1 arcsecond DEM Geoid Research Software

Have a geoid question?
Dr. Daniel Roman 301-713-3202 x161 or
Dr. Yan Ming Wang 301-713-3202 x127

Have a question about absolute gravimetry and gravity base stations?
Mr. Daniel Winester 303-497-7405

Have a question about cryogenic gravimetry?
Mr Douglas Robertson 303-492-3694