(2019) Positioning Navigation and Timing. Leidos. March 28-29

(2019) GIS, State Plane Coordinates, Geodesy, Photogrammetry Refresher Course. Professional Land Surveyors of Colorado,  January 30

(2019) GPS Modernization and GNSS, Coordinates and Geodesy. Washington Council of County Surveyors (WCCS), January 24

(2018) Best Practices for GPS Today, Error Analysis & Least Squares, Coordinates and Geodesy, GPS Modernization and GNSS. North Dakota Society of Professional Land Surveyors, November 28 and 29

(2018) Coordinates and Geodesy, Error Analysis & Least Squares. Texas Society of Professional Surveyors. October 6

(2018) NSRS Modernization. National Geodetic Survey. May 7

(2018) Best Practices for GPS Today, Public Land Survey System. California Land Surveyor Association, March 19

(2018) GPS Modernization and GNSS, Errors and Statistics. Professional Land Surveyors of Colorado,  March 3 & 4

(2018) Best Practices for GPS Today, GIS and GNSS. Western Federation of Professional Land Surveyors (WFPLS), February 23

(2018) Surveying Mathematics and GIS, State Plane Coordinates, Geodesy, Photogrammetry Refresher Course. Professional Land Surveyors of Colorado,  January 24 & 31

(2017) GPS Modernization and GNSS and Best Practices for GNSS. Missouri Society of Professional Surveyors (MSPS), October 21

(2017) A Big Change is Coming, Replacement of NAD83. American Association of State Highway and Transportation Officials (AASHTO). April 12

(2017) GPS/GNSS and Best Practices for GNSS. Montana Association of Registered Land Surveyors, February 24

(2016) Best Practices for GPS and GNSS Today, Coordinates and Geodesy. Southwest Missouri Society of Professional Land Surveyors, August 18 & 19

(2016) Seminar and Presentation on Better, Faster, Cheaper Method of Open Ditch As-Built. American Society of Civil Engineers, July 18

(2016) Public Land Survey System, GPS and GNSS and Best Practices for GNSS. Nevada Association of Land Surveyors & WFPS, April 17 & 18.

(2016) Open Ditch Pipeline As-Builting. SPAR 3D, April 15

(2016) Best Practices for GPS/GNSS and Public Land Survey System. California Land Surveyors Association, March 19 & 20

(2016) Errors and Statistics & GPS and GNSS. Professional Land Surveyors of Colorado, March 3 & 4

(2015) Best Practices for GPS/GNSS. Rhode Island Society of Professional Land Surveyors, June 18

(2014) Public Land Survey System & GPS Modernization and GNSS. CLSA/NALS, April 15 & 16

(2014) Surveying Statistics & Basic Geodesy. Tennessee Association of Professional Surveyors, March 20 & 21

(2013) GPS and GNSS Modernization. Hydrographic Society, October 8

(2013) Big Change Coming in North American Datums. ESRI Petroleum User Group. May 9

(2013) 3D Modeling of Towers with Terrestrial Photogrammetry. SPAR, April 26

(2013) Coordinates and Geodesy & GIS and GNSS. CLSA & NALS, March 26

(2012) Reference Frames and Datums. Mongolian University of Science and Technology, September 19

(2012) GPS and GNSS. Florida Surveying and Mapping Society, August 15

(2012) Title Data Management in the Barnett Shale Play. Denver Association of Lease and Title Analysts, June 14

(2012) Geodesy, Professional Petroleum Data Management, June 7

(2012) Datums and Coordinates. Denver Geophysical Society, May 22

(2012) Coordinates. Denver Geophysical Society January 12

(2012) Terrestrial LiDAR for Oil and Gas. ASPRS January 1

(2012 – 2016) Yearly GPS, State Plane Coordinates and Geodesy Refresher. PLSC, February in Golden, CO

(2011) Midstream in the Barnett. Blue Marble, November 2 in Denver, CO.

(2011) Keynote Address. GIS in the Rockies, August 21 in Denver, CO.

(2011) Geomatics and GIS. 60th Texas Society of Professional Surveyors Conference, October 6 &7 in Frisco, TX

(2011) ESRI Petroleum User Group, Houston Texas, April 19-21 in Houston, TX

  • Basic GIS Coordinates
  • GNSS
  • Midstream GIS in the Barnett
  • Lightsquared


(2010) Specialized GPS and DGPS. United States Coast Guard (NAVCEN), September 2 in Arlington, VA. 

(2010) Methods Used with GIS in the Construction, As-Builting and Data Management for Gas Gathering Lines. Geogathering, August 26 in The Woodlands, TX.

(2010) Review of Ethics for Geospatial Professionals, MAPPS, August 1 in Lake Tahoe, CA.

(2010) The Web Mercator Projection, Boulder-Denver Geospatial Technologists Group, September 14 in Boulder, CO.

(2010) Keynote Address. ESRI UC Imagery and Remote Sensing, ESRI, July 13 in San Diego, CA.

(2010) Coordinates and Geodesy & GPS Modernization and GNSS, Tennessee Association of Professional Surveyors, March 5 & 6 in Murfreesboro, TN.

(2010) We’re Building a Virtual World, but Where? SPAR Point Group, February 9 in The Woodlands, TX.

(2009) GPS and GNSS. ESRI UC Surveying and Engineering Summit, July 12 in San Diego, CA

(2009) Location accuracy: Well Spots, Pipelines and Land Lease Boundaries. E&P Session, October 7 in Denver, CO

(2009) GIS Case Study: Barnett Shale – Managing Data, Delivering Quality, GITA, September 15 in Houston Texas

(2009) GIS. Nevada Association of Land Surveyors and Arizona Professional Land Surveyors, March 16 &17 in Las Vegas, NV

(2009) GIS Case Studies – Managing Data, Delivering Quality. New York State Association of Professional Land Surveyors, January 15 in Albany, NY.

(2008) GPS/GNSS and the Coming Changes. SCPLS, September 6 in Colorado Springs.

(2008) Coordinates & Public Lands. Nevada Association of Land Surveyors, March 18 in Lake Tahoe, NV

(2007) GPS and Geodesy. NALS/APLS/UCLS, December 1 in Las Vegas, NV

(2007) GPS and GNSS. Professional Land Surveyors of Colorado, November 9 in Denver, Colorado.

(2007) Automated Driver Assistance Compliant Road Geometry, TeleAtlas, January 17 in Gent, Belgium.

(2006) GPS for Land Surveyors and Coordinate Systems, NALS, January in Reno, NV.

(2005) GPS for Land Surveyors, Fort Lewis College, June in Durango, CO


GIS Coordinates (2004). V3, August 13 in San Diego, CA

Whitehouse, T. and J. Van Sickle (2004) Crash Location: Some Observations on Challenges and Methodology, Canadian Multidisciplinary Road Safety Conference, June in Ottawa, ON.

(2004) GPS Modernization: CLSA/NALS, April 6 in Las Vegas, NV

(2004) GIS Coordinates. V3, March 12 in Washington, DC.

(2004) Basic GIS Coordinates: 10th Annual California GIS Conference, February 19 in San Jose, CA.

GIS Coordinates (2004). V3, February 13 in Denver, CO.

(1998) A Few Pertinent Ideas About Geodetic Datums for GPS. The Institute of Navigation, June 2 in Denver, CO.

(1997-1998) GPS and the Land Surveyor. Land Surveyor’s Workshops,

  • Charlotte, NC; August 17, 1996
  • Tampa, FL; September 28, 1996
  • Seattle, WA; March 15& 16, 1997
  • Boston, MA; May 10 & 11, 1997
  • Las Vegas, NV; February 21, 1998
  • Cleveland, OH; March 14, 1998
  • Baltimore, MD; March 28, 1998
  • Denver, CO; April 4, 1998
  • Kansas City, MO; April 18, 1998
  • Minneapolis, MN; May 2, 1998

(1985) Triangulation. Professional Land Surveyors of Colorado, October 6 in Denver, CO.

(1982) Magnesium Tracer Range Pole – Type Vertical Projection Triangulation. North Carolina Society of Surveyors, October 2 in Asheville, NC.