NOAA, National Geodetic Survey



SSMC3, Room 8836

Date:      Thursday, September 13, 2012

Time:      2:00-3:30 pm East Coast time

Call In: 877-988-6989, PASSCODE: 1680881



Purpose:  To exchange information and provide an update on National Height Modernization activities, events, and issues; to enable better collaboration with our partners and within NOAA to accomplish Height Modernization objectives; to improve NGS’ Products and Services for our constituents.


NOTE: Because interest in the feature topic is expected to be high, the general meeting has been shortened to 5-10 minutes then the topic presentation will begin.

  1. Updates from States – e.g. projects, outreach
  2. Monthly presentation

Presentation, to start at approximately 2:10 PM: 


Dan Roman, National Geodetic Survey

NGS has recently released updated models for transforming ellipsoidal coordinates and orthometric (e.g. NAVD 88) heights.  After detecting significant defects in the control data used to create GEOID12, GEOID12A was developed as a replacement.  This presentation will discuss the development of changes in the most recent geoid models.

Daniel R. Roman, Ph.D. (This email address is being protected from spambots. You need JavaScript enabled to view it.), has been a Research Geodesist with NGS since 1999. He is the team lead for Geoid Modeling and Research as well as the Principal Investigator for the Gravity for Redefinition of the American Vertical Datum (GRAV-D) Project. He has participated in development of GEOID99, GEOID03, GEOID06, GEOID09 and associated models. He also leads the scientific effort towards a cm-level geoid height model that will replace NAVD 88 and serve as a future vertical datum. He has a B.S. from the University of Southern California in Geology (1985), a M.S. from the Ohio State University in Physical Geodesy (1993), and a Ph.D. from the Ohio State University in Potential Fields Geophysics (1999). He is a member of the International Association of Geodesy, American Geophysical Union, Canadian Geophysical Union, Society for Exploration Geophysicists, International Federation of Surveyors (FIG), American Congress on Surveying and Mapping, and American Association of Geodetic Surveyors.

  1. Other Business

Important Links:  Previous months’ meeting notes and a list of future meeting presentations can be found at: