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MALSCE September 27 Seminar: Evolution of the National Spatial Reference System & Using and Underst

Type:  Featured News  

Evolution of the National Spatial Reference System
Using and Understanding the On-line Positioning User Service (OPUS)


Friday, September 27, 2013

Clark University MetroWest Campus, 333 Turnpike Rd (Route 9 West), Southborough, MA

8:00 - 8:30 AM Registration; 8:30 AM - 4:30 PM Seminar


MALSCE members $180*; Non-members $230

*Members of CALS, MSLS, NHLSA, NYSAPLS, REBA, RISPLS and VSLS can attend for the MALSCE Member rate.


Download the brochure


Register online


Evolution of the National Spatial Reference System – NAD 83 (2011) and GEOID 12


In July 2012, the National Geodetic Survey released the latest realization of NAD 83 and a new companion geoid model.  This presentation will discuss a brief history of NAD 83, and reasons for its ongoing evolution.  We will discuss the data used to produce the National Adjustment of 2011 (NA2011), and the concept (and need) to introduce velocities.  Also discussed will be the relationships of geoid models to various versions of NAD 83 and what can happen if these relationships are ignored.


Using and Understanding the On-line Positioning User Service (OPUS)


The national Geodetic Survey (NGS) operates the On-line Positioning User Service (OPUS) as a means to provide GPS users easier access to the National Spatial Reference System (NSRS).  OPUS allows users to email their GPS data files to NGS, where the data will be processed against the Continuously Operating Reference Station (CORS) network to determine a position using NGS computers and software. This seminar will discuss:

  • The history and development of OPUS products
  • A discussion of OPUS accuracies (and things that affect the accuracies)
  • Recommended collection procedures, data requirements, and data management
  • A discussion of how to use each of the OPUS products and how they work
  • An in-depth look at the output of OPUS and a discussion of OPUS statistics and quality indicators
  • What can be done to make a poor solution better?
  • A discussion on datums and coordinate systems for OPUS
  • The recent CORS Multi-Year Solution and National Adjustment of 2011


Seminar Speaker:

Daniel J. Martin
Vermont Geodetic Advisor
NOAA/NOS/National Geodetic Survey


Dan Martin works for the National Geodetic Survey and is the Geodetic Advisor to the State of Vermont.  He worked for the Route Survey and Geodetic Survey sections of the Vermont Agency of Transportation from 1988 through 2003, and held the position of Geodetic Program Supervisor for the Agency from 1999 through 2003.  In 2003 Dan began his career with the National Geodetic Survey.  As the State Geodetic Advisor, he instructs local surveyors and state and municipal agencies on how to use and preserve the National Spatial Reference System, and provides liaison between the National Geodetic Survey and the State of Vermont. Dan is a Past President of the American Association for Geodetic Surveying (AAGS), and is a Fellow Member of the American Congress on Surveying and Mapping and recently served as the ACSM Congress Chair.  He is also a member of the Vermont Society of Land Surveyors, and a new member of New Hampshire Land Surveyors Association.



Registration Information:

Registration fees are $180/person for MALSCE members and $230/person for non-members.  Registration fee includes a continental breakfast, two snack breaks, lunch and all seminar handouts. Registration is processed on a first-come, first-served basis.

Registration deadline: Monday, September 23, 2013.  A 50% refund will be given for cancellations made by September 23.  No refunds will be given after this date. No-shows will be billed.



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