Alaska Orthoimagery/ElevationThis project coordinates the acquisition of imagery (RADAR, LIDAR, CIR aerial photography, and digital satellite images) via contracts that will provide 5-meter DEM's and an ortho-rectified image base for Alaska.
This project coordinates the acquisition of imagery (RADAR, LIDAR, CIR aerial photography, and digital satellite images) via contracts that will provide 5-meter DEM's and an ortho-rectified image base for Alaska. Work began in the National Petroleum Reserve Alaska (NPRA) in the early 2000’s and will extend to other areas in the State as funding becomes available. The vast majority of topographic maps and DEM's for Alaska are over 40 years old, do not meet National Map Accuracy Standards, nor is current aerial photography available to meet these standards along with associated DEM's that would allow for ortho-imagery corrections. In 2006 the State of Alaska began an initiative is called the Statewide Digital Mapping initiative (SDMI) to acquire satellite based Orthoimagery and produce a Digital Elevation Model (DEM) from Interferometric Synthetic Aperture Radar (IFSAR) data with coverage for the entire state. This initiative represents a merging of Federal and State efforts to reach a common goal. The Imagery portion of SDMI is led by Alaska Department of Natural Resources and the University of Alaska Fairbanks. The elevation portion of SDMI is led by Alaska Department of Transportation and is conducted in collaboration with numerous State of Alaska and Federal Agencies. USGS contracts the collection of the IFSAR data through it Geospatial Products and Services contract (GPSC; http://geodatacontracts.er.usgs.gov/). The Funding for the elevation data collection to date has come from a number of Federal agencies and the State of Alaska. Significant Elevation data collection began in 2010. Update May 2012: By the end of the 2012 collection season it is estimated that the orthoimagery project will have collected approximately 40% to 50% of the state. The elevation project will have collected approximately 30% of the state.
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