3d-DEM optimization-Zagros Ranges [very small, nearest neighbour resampling]
The ALOS, SRTM and ASTER GDEM representation of the study area. The study area is bounded by latitude and longitude in the range 27.1107° to 27.5555° and 54.2362° to 54.6810° respectively corresponding to the central portion of Zagros Ranges in Iran where collision of the Arabian shield with he Eurasian Plate has shortened and thickened the crust to produce a spectacular mountainous physiography. The data are posted on a 1 arc-second grid and horizontally referenced to the 1984 World Geodetic System (WGS84) while the 1996 Earth Gravitational Model (EGM96) geoid is the vertical datum. The very small study area of Zagros Ranges. The resampling (matching) of the 3 DEMs is rather bad (nearest neighbor method was applied)
Steps to reproduce
AGDEM2, 2011, ASTER GDEM version 2 (a product of Ministry of Economy, Trade, and Industry of Japan and NASA). Available online at: https://lpdaac.usgs.gov/dataset_discovery/aster/aster_products_table/astgtm (accessed january 31 2018). AW3D30, 2016, ALOS Global Digital Surface Model, (ALOS World 3D – 30m). Available online at: http://www.eorc.jaxa.jp/ALOS/en/aw3d30/index.htm (accessed january 31 2018). SRTM1ARC, 2017, Shuttle Radar Topography Mission 1 Arc-Second GDEM. USGS. Available online at: https://lta.cr.usgs.gov/SRTM1Arc (accessed january 3 2018). EARTH EXPLORER, 2017, Web access to free/open remotely-sensed data. US Geological Survey. Available online at:https://earthexplorer.usgs.gov/ (accessed january 31 2018). SVR.DEM, 2018, Selective variance reduction for digital elevation models. GitHub Project. Available online at: https://github.com/miliaresis/SVR.DEM (accessed january 3 2018).