Phone: (512) 869-1450
Electronic Navigation, Precise Positioning, and Geographic Information Systems Research and Development
June 1, 2011. Participatory Mapping Methods: Review and Suggestion. Foro Internacional, Cartografía Participativa y Derechos al Territorio y los Recursos. Universidad de Los Andes. Bogotá, Colombia. 1-2 June, 2011.
April 10, 2010. Participatory Mapping by Indigenous People of Central America. People, Power, and Maps: Texas Map Society Spring Meeting, Austin, Texas.
March 24, 2010. Lessons Learned from Participatory Mapping in Central America. Global Environmental Speaker Series. University of Richmond. Richmond, Virginiia.
April 7, 2009. Archaeological Spatial Analysis with Geographic Information Systems. Landscape Archaeology Seminar, Department of Classics, University of Texas at Austin.
May 7, 2008. GIS in the Liberal Arts. Workshop Presentation, Southwestern University, Georgetown, Texas.
May 3, 2007. Discrete Global Grids and the
U.S. National Grid in GIS Teaching and Research. Mapping
Science Committee. The National Academies.
March 10, 2006. (with Malcolm Cutchin and Jim Stimpson) Conceptualizing and Using Neighborhoods for the Analysis of Health and Place. The Association of American Geographers, 102nd Annual Meeting, Chicago, Illinois.
March 09, 2006. Space-Claiming Categories for Community Mapping. The Association of American Geographers, 102nd Annual Meeting, Chicago, Illinois.
March 02, 2006. Whose Lands These Are: (You think you know?). Center for Northern Studies, Sterling College, Wolcott, Vermont.
April 5, 2005. Estimating Early Greek Settlement Patterns in Southern Italy from Ceramic Evidence. The Association of American Geographers 101st Annual Meeting, New Orleans, LA.
October 15, 2004.
Estimating Early Greek
Farm Significance Patterns in Southern Italy Using Multiple-Criteria Evaluation
and Cost-Weighted Surfaces. Colloquium. Department of Geography Colloquia Series.
April, 19, 2002. Replacing
Form with Function: Land-Use Categorization Based on Local Knowledge and Ground
Truth. Research Action Roundtable. GPS Mapping of
Land-Use Areas in Awas Tingni:
Technical, Political, And Legal Considerations. From
Human Rights to Cultural Empowerment: The Awas Tingni Ruling and the Struggle for Indigenous & Black
Land Right in the
January 7, 2000. Mapping Community Boundaries on Nicaragua’s Caribbean Coast. Panel on Maps, Mapping, and Indigenous Peoples. Conference of Latin Americanist Geographers. 2000 Meeting, Austin, Texas.
March 5, 1998. Invited speaker. GPS: Positioning Techniques and Time and Frequency Dissemination. Tecnología Sin Límite: XIII Simposium Internacional De Electrónica y Comunicaciones. ITESM, Monterrey, Mexico.
February 20, 1998. Invited speaker. Matching GPS Methods to Applications. Hydrogeology Brownbag Seminar. Department of Geology, University of Texas at Austin.
December 15-19, 1997. Workshops. GIS and GPS for Surveying Applications. BTW Associates, Ltd., New Plymouth, New Zealand.
1997. Workshop. Appropriate GPS Methods for GIS Applications. 1997 Texas GIS Forum.
May 9, 1997. Guest lecture. GPS Time Dissemination Austin Astronomical Society Monthly Meeting, Austin, Texas.
October 21, 1996.
Guest lecture. GPS for Transportation Research.
October 16, 1996. Guest lecture. GPS for Time and Frequency Dissemination. Physics Department Colloquium, University of Texas at Austin.
May 4, 1996. Guest lecture. An Overview of GPS. Saturday Physics Workshop. Department of Physics, University of Texas at Austin.
August 23, 1994. Guest lecture. Greytown to Graytown, Walker to
October 21, 1993. Paper presentation. Geographic Information System Loran-C Coverage Modeling. Wild Goose Association's Twenty-Second Annual Technical Symposium, Santa Barbara, California.
October 26, 1992. Workshop. Introduction to the Global Positioning System. Texas Geographic Information Systems Forum, Co-sponsored by the Department of Information Resources and Texas Natural Resources Information System, Austin, Texas.
October 24, 1990. Paper presentation. The Raymondville Ghost: Loran-C Signal Reflections. The Wild Goose Association's Nineteenth Annual Technical Symposium, Long Beach, California.
October 4, 1990. Paper presentation. Automated Animal Tracking System Map Display. The 1990 Annual
Meeting of the Southwest Division, Association of American Geographers,
October 30, 1989. Paper presentation. Automated Animal-Tracking System: Tracking Elk with Retransmitted Loran-C. The Wild Goose Association's Eighteenth Annual Technical Symposium, Hyannis, Massachusetts.