David Brostuen, vice president of Sanborn, announced that the company won a contract from the Wyoming State Engineers Office to update the state’s database of digital orthophoto quarter quadrangle (DOQQ) images. An extensive user of GIS, Wyoming recognized that the DOQQ images it relies on, initially produced under the United States Geological Survey (USGS) contract in 1994, are no longer current enough to support GIS activity. The new images will be shared by multiple agencies and private sector groups and will benefit Wyoming’s economic potential in the areas of environment, mining, and water resource planning, to name a few. Using the new imagery, the Eastern Shoshone and Northern Arapahoe tribes will create an emergency response plan for the Wind River Reservation, the Big Horn County GIS department will make more accurate maps, and the Big Horn County Assessor’s Office will be able to determine agriculture classifications. Among other projects slated to make use of the new data are an oil field equipment inventory, a wildfire response plan whereby water sources for fire trucks will be located, and the tracking of the prairie dog population. To update the Equality State’s GIS, Sanborn will produce approximately 1,565 digital orthophoto quads (DOQs) and 6,260 DOQQs from photography collected in 2001 and 2003 by the Aerial Photography Federal Office (APFO). The files will then be compressed and delivered on a county-by-county basis. While producing the images, Sanborn will make significant enhancements to the typical USGS format. The 1-meter resolution color-infrared imagery will be generated in one seamless database of color-balanced digital orthophoto data, and as the database is completed for an area, the DOQs, DOQQs and county data will be extracted from the single database. Each set of extracted data will be delivered in a compressed image format for rapid viewing. A second-generation ortho-rectification technique will be used in the creation of the new images. Sanborn’s Visual Orientation (VisOriTM) second-generation ortho-rectification software, which uses existing DOQQs, DEM data, and the scanned aerial photo imagery as input, eliminates the need for field survey control and a standard aerial triangulation solution.
Several agencies will benefit from the Wyoming update project, but priority will be given in particular to high interest energy production, State Homeland Security and wildfire urban interface areas. Other agencies will be involved in the project to ensure that it runs smoothly: The Wyoming Bureau of Land Management will facilitate delivery of the source scan data to Sanborn, and The Rocky Mountain Mapping division of the USGS will provide quality assurance review. Sanborn expects to complete the project by December of 2003. With a rich tradition of mapping dating back to 1866, Sanborn offers a full suite of GIS and photogrammetric mapping services to federal, state, and local governments, as well as private companies. The company’s core services include data acquisition, photogrammetric mapping, and data conversion. The company has offices in the United States and abroad.