GDEMGeneralized Digital Environmental Model
GDEMGovernor's Division of Emergency Management (Texas)
GDEMGlobal Digital Elevation Model
GDEMGuideline-Directed Evaluation and Management (cardio-oncology)
GDEMGeneralized Digital Environmental Model Data Base
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The imported layers of wetlands in Global mapper were imposed on the ASTER GDEM V2 worldwide elevation data (1 Arc second resolution) to get three-dimensional measurements of the water bodies.
Features considered Source Urban areas Landsat 7 satellite image Forest areas Landsat 7 satellite image Topography (slope, CGIAR-CSI DEM of 90 m aspect) resolution/Aster GDEM of 30 m Hydrology ASTER GDEM Vegetation Landsat 7 satellite image National parks National parks map Features considered Method of creation Urban areas Unsupervised classification Forest areas Supervised classification Topography (slope, Import via GIS (grid) and Erdas (raster) aspect) Hydrology Geoprocessing tool/hydrology tool in GIS Vegetation Normalized difference vegetation index (NDVI) National parks Digitizing/georeferencing Table 6: Criteria weights in sensitivity analysis when one factor's weight is changed from original weight (i.e., base map) by -18, -12, -6, 6, 12, or 18%.
Excluded layers were produced using GDEM, an ecoenvironmental conservation value assessment map (ECVAM), water bodies, the greenbelt zone, and the zone eliminated from the greenbelt.
A digital elevation model (DEM) was constructed using GIS software and information obtained from ASTER GDEM V2 (NASA, 2011).
Digital Elevation Model (DEM) data were acquired from the Japanese-American satellite ASTER GDEM. The used DEM is validated by the provider and ASTER GDEM is highly accurate DEM covering all the land on earth with 30 m spatial resolution.
This cartographic database comprised a 30m horizontal resolution ASTER GDEM digital elevation model (DEM) (ABRAMS et al., 1999), and vector layers of the soil map and stream network.