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Article

The New Landsat Collection-2 Digital Elevation Model

by
Shannon Franks
1,*,
James Storey
2 and
Rajagopalan Rengarajan
2
1
KBR, Contractor to NASA Goddard Space Flight Center, 8600 Greenbelt Road, Greenbelt, MD 20771, USA
2
KBR, Contractor to the U.S. Geological Survey, Earth Resources Observation and Science Center, Sioux Falls, SD 57030, USA
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(23), 3909; https://doi.org/10.3390/rs12233909
Submission received: 28 September 2020 / Revised: 20 November 2020 / Accepted: 27 November 2020 / Published: 28 November 2020
(This article belongs to the Special Issue Cross-Calibration and Interoperability of Remote Sensing Instruments)

Abstract

The Landsat Collection-2 distribution introduces a new global Digital Elevation Model (DEM) for scene orthorectification. The new global DEM is a composite of the latest and most accurate freely available DEM sources and will include reprocessed Shuttle Radar Topographic Mission (SRTM) data (called NASADEM), high-resolution stereo optical data (ArcticDEM), a new National Elevation Dataset (NED) and various publicly available national datasets including the Canadian Digital Elevation Model (CDEM) and DEMs for Sweden, Norway and Finland (SNF). The new DEM will be available world-wide with few exceptions. It is anticipated that the transition from the Collection-1 DEM at 3 arcsecond to the new DEM will be seamless because processing methods to maintain a seamless transition were employed, void filling techniques were used, where persistent gaps were found, and the pixel spacing is the same between the two collections. Improvements to the vertical accuracy were realized by differencing accuracies of other elevation datasets to the new DEM. The greatest improvement occurred where ArcticDEM data were used, where an improvement of 35 m was measured. By using theses improved vertical values in a line of sight algorithm, horizontal improvements were noted in some of the most mountainous regions over multiple 30-m Landsat pixels. This new DEM will be used to process all of the scenes from Landsat 1-8 in Collection-2 processing and will be made available to the public by the end of 2020.
Keywords: vertical accuracy; WorldDEM; ICESat; ArcticDEM; NASADEM; CDEM; NED; orthorectification; Global Land Survey; DEM; SRTM; Landsat; Collection-2 processing vertical accuracy; WorldDEM; ICESat; ArcticDEM; NASADEM; CDEM; NED; orthorectification; Global Land Survey; DEM; SRTM; Landsat; Collection-2 processing
Graphical Abstract

Share and Cite

MDPI and ACS Style

Franks, S.; Storey, J.; Rengarajan, R. The New Landsat Collection-2 Digital Elevation Model. Remote Sens. 2020, 12, 3909. https://doi.org/10.3390/rs12233909

AMA Style

Franks S, Storey J, Rengarajan R. The New Landsat Collection-2 Digital Elevation Model. Remote Sensing. 2020; 12(23):3909. https://doi.org/10.3390/rs12233909

Chicago/Turabian Style

Franks, Shannon, James Storey, and Rajagopalan Rengarajan. 2020. "The New Landsat Collection-2 Digital Elevation Model" Remote Sensing 12, no. 23: 3909. https://doi.org/10.3390/rs12233909

APA Style

Franks, S., Storey, J., & Rengarajan, R. (2020). The New Landsat Collection-2 Digital Elevation Model. Remote Sensing, 12(23), 3909. https://doi.org/10.3390/rs12233909

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