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Output DEM raster files are available as 1) “strip” files output directly from SETSM that preserve the original source material temporal resolution and 2) mosaic files compiled from multiple strips that have been co-registered, blended, and feathered to reduce edge-matching artifacts. Howat, Automated stereo-photogrammetric DEM generation at high latitudes: Surface Extraction from TIN-Based Search Minimization (SETSM) validation and demonstration over glaciated regions, GIScience and Remote Sensing, doi:10.1080/15481603.2015.1008621 Noh and Ian Howat at the Ohio State University, stereopair images are processed to digital elevation models (DEMs) using the Blue Waters supercomputer located at the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign.įor additional information on SETSM software, see:
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#Polar digital terrain model software
Using the SETSM software developed by M.J. MethodologyĪrcticDEM data is generated by applying stereo auto-correlation techniques to overlapping pairs of high-resolution optical satellite images. Chairmanship of the Arctic Council, which began in April 2015. The objective of the ArcticDEM initiative was to create a comprehensive elevation model of the Arctic within the two-year term of the U.S. The project began with a release of data over Alaska in September 2016 and continued to other regions on a continual basis over the next two years. In addition, coverage includes territory of Greenland, the entire state of Alaska, and the Kamchatka Peninsula of the Russian Federation. ScopeĪrcticDEM data encompasses all land area north of 60° north latitude. The producers did not intend the final product to be a single “eyes on” or edited product, but rather a collection of time-dependent elevation models and the infrastructure to process the flow of imagery from an ever-expanding constellation of satellites producing an ever-increasing volume of high-quality data. It is a response to the need for high-quality data in remote locations, the availability of technology to cope with big data, and the need to measure topographic change. The computation is performed on the NSF-supported Blue Waters petascale supercomputer at the National Center for Supercomputing Applications.ĪrcticDEM offers a different way of producing and providing terrain data.The imagery is processed into 2 meter posting elevation models using the Ohio State University’s software package Surface Extraction with TIN-based Search-space Minimization (SETSM).DigitalGlobe’s WorldView-1, WorldView-2, and WorldView-3 satellites collect stereoscopic imagery of the Arctic.The Polar Geospatial Center and collaborating institutions are using a three-pronged strategy to produce over 20 trillion 2-by-2 meter elevation cells over an area of 20 million square kilometers. The product is a collection of time-dependent DEM strips and a seamless terrain mosaic that can be distributed without restriction. BackgroundĪrcticDEM is a National Geospatial-Intelligence Agency (NGA) and National Science Foundation (NSF) public-private initiative to automatically produce a high-resolution, high-quality digital surface model (DSM) of the Arctic using optical stereo imagery, high-performance computing, and open source photogrammetry software. The ArcticDEM is a collaborative project to produce a 2-meter resolution pan-Arctic Digital Elevation Model.