Makes Bird's-eye view pictures, stereographic pictures, profile charts.Makes Conical, Orthographic, Mercator, Azimuthal Equidistant and Azimuthal Equal-Area projection maps.Draws contour lines on the color elevation map.User can create lake data for various DEMs. Displays color elevation map in a window with or without shading.GTOPO30, HYDRO1K, SRTM, SRTM DTED, SRTM30plus, ETOPO1, ETOPO2, ETOPO5, GLOBE, GDEM, GeoTiff, netCDF, PDS DEM, some BIL forms, USGS Ascii, USGS SDTS, ArcInfo Ascii, DEMs from GSI of Japan.
DEM DATA FREE DOWNLOAD MAC
Some restrictions are added because of Mac App Store technical requirement. Mac App Store version SimpleDEMViewerAS is available. SimpleDEMViewer draws bird's-eye view, stereographs, panorama view, grayscale map, orthographic, Mercator and other projection maps. Since no data is included in this package, user should prepare DEM data separately. ¹The contents of the NUM file indicate number of DEM tiles used and the source of the data.SimpleDEMViewer browses DEM ( Digital Elevation Model ) data as a relief map. While the ASTER GDEM Version 3 data products offer substantial improvements over Version 2, users are advised that the products still may contain anomalies and artifacts that will reduce its usability for certain applications. The NUM layer indicates the number of scenes that were processed for each pixel and the source of the data. Provided in the ASTER GDEM product are layers for DEM and number of scenes (NUM). Each of the 22,912 tiles in the collection contain at least 0.01% land area. Data are projected on the 1984 World Geodetic System (WGS84)/1996 Earth Gravitational Model (EGM96) geoid. Each tile is distributed in Cloud Optimized GeoTIFF (COG) format through NASA Earthdata Search and in standard GeoTIFF format through the LP DAAC Data Pool. The geographic coverage of the ASTER GDEM extends from 83° North to 83° South. To correct elevation values of water body surfaces, the ASTER Global Water Bodies Database ( ASTWBD) Version 1 data product was also generated. Selected data were averaged to create final pixel values before partitioning the data into 1° by 1° tiles with a one pixel overlap. In areas with limited data stacking, several existing reference DEMs were used to supplement ASTER data to correct for residual anomalies. Residual bad values and outliers were removed. All cloud screened DEMs and non-cloud screened DEMs were stacked. Stereo correlation was used to produce over one million individual scene based ASTER DEMs, to which cloud masking was applied.
DEM DATA FREE DOWNLOAD ARCHIVE
The ASTER GDEM Version 3 data product was created from the automated processing of the entire ASTER Level 1A archive of scenes acquired between March 1, 2000, and November 30, 2013. The ASTER GDEM data products are created by the Sensor Information Laboratory Corporation (SILC) in Tokyo. The development of the ASTER GDEM data products is a collaborative effort between National Aeronautics and Space Administration (NASA) and Japan’s Ministry of Economy, Trade, and Industry (METI). The Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) provides a global digital elevation model (DEM) of land areas on Earth at a spatial resolution of 1 arc second (approximately 30 meter horizontal posting at the equator).
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