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Alaska Geographic Data Committee (AGDC) Introductions Mark Shasby, USGS, AGDC Co-Chair, opened the meeting and welcomed the attendees. He introduced Rich McMahon, State of Alaska Department of Natural Resources, AGDC Co-Chair, who facilitated the meeting. I-Team Concept McMahon, Alaska I-Team Coordinator, outlined the I-Team concept that brings together the essential elements of collaboration and coordination in order to organize the production, stewardship, and exchange of data in a National Spatial Data Infrastructure (NSDI). I-Teams and other information consortia supply some of the tools necessary to collaborate and coordinate which cannot occur without communication. The focus of today’s meeting is aimed at initiating an I-Team implementation plan in Alaska. In order to familiarize yourself with I-Team concepts and to view other State plans already in development, please reference the Federal Geographic Data Committee’s (FGDC) website at http://www.fgdc.gov/I-Team/. Ron Matzner, National I-Team Coordinator, FGDC, provides an overview of the I-Team initiative at http://www.esri.com/news/arcnews/fall01articles/iteam-initiative.html. Mr. Matzner will be the featured speaker at the next AGDC meeting scheduled for March 20, 2003. The time and location of the meeting will be announced via email and will be posted on the AGDC Clearinghouse at http://agdc.usgs.gov when they are determined. Project Presentations Preliminary Results of SAR Tandem Mission Data for DEM Generation in the Fairbanks Area – Steps to a Statewide Elevation Model Rick Guritz, University of Alaska Fairbanks, Alaska SAR Facility, gave a presentation on this project. The Alaska SAR Facility just completed a two-year project for NASA that investigated the use of SAR interferometry for the production of digital elevation models (DEM). As part of this study, a fairly in-depth comparison was made between Intermap Star3i data (commercial 5-meter posting); NASA TOPSAR data (research 5-meter posting); ESA Tandem Mission data (research 30-meter posting); Shuttle Radar Topography Mission data (research 30-meter posting); and USGS data (2x3 arc-second data at 30x60 meters posting). As part of this research, prototype DEM mosaic products were produced from NASA TOPSAR data and ESA Tandem Mission data for the Fairbanks area. Comparisons were made between all four DEM sources. Prototype products were also provided to the State of Alaska Departments of Natural Resources-Forestry Division, and the Division of Geological and Geophysical Surveys for their evaluation. Alaska DNR Forestry Division has a NASA-funded project in which they have been evaluating DEM mosaics produced at the SAR facility for ortho-rectification of Quickbird .6-meter optical data. They have also collected an extensive GPS road survey at different dates and then removed elevations that disagree by more than 10-meters horizontal and 4-meters vertical between the two surveys. These source DEMs were then evaluated for their accuracy. The GPS collection represents a collection of over 33,000 points that were within the accuracy requirements between measurements. The GPS survey and height assessment was conducted by Dave Burns, Alaska DNR Forestry. The achievable accuracy of the data proved to be encouraging. The research evaluation team includes Paul Rosen and Scott Hensley for the Jet Propulsion Lab, Howard Zebker from Stanford University, Bob Onstott from Veridian, Rudi Gens, Chris Wyatt, Joanne Groves and Rick Guritz from the Alaska SAR Facility. Tanana Valley Orthoimagery Marc Lee, State of Alaska Department of Natural Resources, Forestry Division, Fairbanks, gave a presentation on the Tanana Valley Ortho-Imagery project. This project was funded through a $600,000 grant from NASA. High-resolution aerial imagery was acquired over 15 towns and villages in the Tanana Valley except Fairbanks and North Pole. This imagery will be invaluable for wildfire management and response. Lee explained how the imagery is ortho-rectified through the application of geodetic control points and the development of DEMs. Orthoimagery Acquisition for the National Petroleum Reserve Alaska (NPRA) Gust Panos, BLM Alaska Office, gave an update on data acquisition activities that are proceeding in the eastern portion of the NPRA. Data acquisition began in 2001. Intermap has been producing the DEMs at 5-meter postings with 1 to 2-meter resolution. Color-infrared digital orthquadrangles (DOQ) are being produced at 1:25,000-scale from 1:40,000-scale aerial photography and the first delivery of these products is expected shortly. The initial area of interest covers 161 1:25,000-scale quarter-quads. Another 160 quarter-quads will be covered pending additional funding. The approximate cost for data completion for each quarter-quad is $12,000. The data will be in the public domain. The development of Environmental Impact Statements (EIS) and tract leasing will continue through the auspices of the BLM. Geographic Information Network of Alaska (GINA) Project - Access to Statewide LANDSAT 7 Imagery Shari George, University of Alaska Fairbanks, gave a presentation on the efforts to build an online Alaska satellite image archive as part of the University of Alaska’s Geographic Information Network of Alaska (GINA) Project. This archive will include AVHRR, MODIS, and Landsat data. The Landsat collection will include Landsat held by the University of Alaska, a copy of the Alaska Multi-Resolution Land Cover (MRLC) data as well as additional Landsat data that others are willing to share. Goals of this project include online access; geospatial and multi-sensor query tools; visual browse tools; and a customizable ordering capability. The MRLC data will be brought online over the next several months. Other Landsat, MODIS, and AVHRR data can be viewed by visiting “ION’s Data Resources” at http://www.gina.alaska.edu/. The University of Alaska is also a member of the AmericaView Consortium which is working towards affordable integrated access and delivery of United States government satellite and geospatial data to the public. Through the AmericaView program, the University will be adding Landsat data to the Alaska archive and cost-sharing opportunities will be available. For additional information on the GINA project, please contact Shari at 907.474.6445 or email sgeorge@gina.alaska.edu. Highway and Airport Control System and an Introduction to Continuously Operating Reference Stations (CORS) Jim Sharp and Michael Schoder, State of Alaska Department of Transportation and Public Facilities (ADOT/PF) gave a presentation the Alaska Central Region’s Highway and Airport Control Systems. Sharp gave a brief overview of the region’s boundaries, airport locations and density of control in the Anchorage and Matanuska-Susitna areas. There was a short discussion on the local and geodetic control systems and the Department’s desire to make this information easily available to the public. Schoder followed with a more detailed overview of the Continuously Operating Reference Stations (CORS) coordinate system. He described the CORS system, identified the current coverage in Alaska, discussed datums, advantages, services, costs and issues associated with CORS. For additional information, visit the CORS website at http://www.ngs.noaa.gov/CORS. Sharp’s and Schoder’s presentation can be found at ftp://chugach.dnr.state.ak.us/dot-cadastral/. Clearinghouse Updates Emily Binnian, USGS, gave an update on the status of the Alaska Geospatial Data Clearinghouse (AGDC). She provided a brief overview on the ambitious USGS’ National Map project that will collect eight critical data layers initially over 133 urban areas as identified by USGS and the National Imagery Mapping Agency (NIMA) in response to national homeland security efforts. These data will be in the public domain and available through Clearinghouses nationwide. Anchorage and Juneau have been identified as two of the 133 cities. The National Map website is located at http://nationalmap.gov/. Sean Weems, Alaska Department of Natural Resources, gave an update on the status of the Alaska State Geospatial Data Clearinghouse (ASGDC). He noted that work on the State Clearinghouse is on hold at present pending the hiring of a new Webmaster. The ASGDC website is located at http://www.asgdc.state.ak.us. Next Meeting The next general AGDC membership meeting will be held on March 20, 2003. Time and location will be determined at a later date. Ron Matzner, National I-Team Coordinator, Federal Geographic Data Committee (FGDC), Reston, VA, will give a presentation on “I-Team Collaboration Lessons.” In addition, AGDC Subcommittee representatives will provide status updates on their respective activities. |
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