Digital elevation model (DEM) from the Hydrologic Derivatives for Modeling and Analysis (HDMA) database -- Greenland
Dataset Identification:
Resource Abstract:
This dataset contains the Digital Elevation Model (DEM) for Greenland from the Hydrologic Derivatives for Modeling and Analysis
(HDMA) database. The HDMA database provides comprehensive and consistent global coverage of raster and vector topographically
derived layers, including raster layers of digital elevation model (DEM) data, flow direction, flow accumulation, slope, and
compound topographic index (CTI); and vector layers of streams and catchment boundaries. The coverage of the data is global
(-180 , 180 , -90 , 90 ) with the underlying DEM being a hybrid of three datasets: HydroSHEDS (Hydrological data and maps
based on SHuttle Elevation Derivatives at multiple Scales), Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010)
and the Shuttle Radar Topography Mission (SRTM). For most of the globe south of 60 North, the raster resolution of the data
is 3-arc-seconds, corresponding to the resolution of the SRTM. For the areas North of 60 , the resolution is 7.5-arc-seconds
(the smallest resolution of the GMTED2010 dataset) except for Greenland, where the resolution is 30-arc-seconds. The streams
and catchments are attributed with Pfafstetter codes, based on a hierarchical numbering system, that carry important topological
information.
Citation
Title Digital elevation model (DEM) from the Hydrologic Derivatives for Modeling and Analysis (HDMA) database -- Greenland
other Citation Details
Cinergi keyword enhanced.File generated at Wed Dec 05 04:10:12 UTC 2018
purpose:
This dataset contains the DEM for Greenland from the Hydrologic Derivatives for Modeling and Analysis (HDMA) database. This
dataset is appropriate for use in continental-scale modeling effort. The Pfafstetter codes provide topological information
that can be useful for upstream and downstream tracing.