DEM-H: Australian SRTM Hydrologically Enforced Digital Elevation Model

Dataset Availability

2010-02-01T00:00:00Z–2010-02-01T00:00:00Z

Dataset Provider

Geoscience Australia

Earth Engine Snippet

ee.Image("AU/GA/DEM_1SEC/v10/DEM-H")

Tags

australia dem elevation ga geophysical geoscience-australia smoothed srtm

Description

The Hydrologically Enforced Digital Elevation Model (DEM-H) was derived from the SRTM data acquired by NASA in February 2000. The model has been hydrologically conditioned and drainage enforced. The DEM-H captures flow paths based on SRTM elevations and mapped stream lines, and supports delineation of catchments and related hydrological attributes. The dataset was derived from the 1 second smoothed Digital Elevation Model (DEM-S; ANZCW0703014016) by enforcing hydrological connectivity with the ANUDEM software, using selected AusHydro V1.6 (February 2010) 1:250,000 scale watercourse lines (ANZCW0503900101) and lines derived from DEM-S to define the watercourses. The drainage enforcement has produced a consistent representation of hydrological connectivity with some elevation artifacts resulting from the drainage enforcement. A full description of the methods is in preparation (Dowling et al., in prep).

This product provides a DEM suitable for use in hydrological analysis such as catchment definition and flow routing.

There are several areas with unexpected negative values: close to Canberra around (150.443044, -35.355281) with values of -55 and in Western Australia around (124.84, -16.44) with -43.

Bands

Resolution
30.92 meters

Bands

Name	Units	Min	Max	Description
elevation	m	-31.37*	2223.24*	Elevation

* estimated min or max value

Terms of Use

Terms of Use

CC-BY-4.0

Citations

Citations:

• Geoscience Australia, 2015. Digital Elevation Model (DEM) of Australia derived from LiDAR 5 Metre Grid. Geoscience Australia, Canberra.

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Code Editor (JavaScript)

var dataset = ee.Image('AU/GA/DEM_1SEC/v10/DEM-H');
var elevation = dataset.select('elevation');
var elevationVis = {
  min: -10.0,
  max: 1300.0,
  palette: [
    '3ae237', 'b5e22e', 'd6e21f', 'fff705', 'ffd611', 'ffb613', 'ff8b13',
    'ff6e08', 'ff500d', 'ff0000', 'de0101', 'c21301', '0602ff', '235cb1',
    '307ef3', '269db1', '30c8e2', '32d3ef', '3be285', '3ff38f', '86e26f'
  ],
};
Map.setCenter(133.95, -24.69, 5);
Map.addLayer(elevation, elevationVis, 'Elevation');

Open in Code Editor

DEM-H: Australian SRTM Hydrologically Enforced Digital Elevation Model

The Hydrologically Enforced Digital Elevation Model (DEM-H) was derived from the SRTM data acquired by NASA in February 2000. The model has been hydrologically conditioned and drainage enforced. The DEM-H captures flow paths based on SRTM elevations and mapped stream lines, and supports delineation of catchments and related hydrological attributes. …

AU/GA/DEM_1SEC/v10/DEM-H, australia,dem,elevation,ga,geophysical,geoscience-australia,smoothed,srtm

2010-02-01T00:00:00Z/2010-02-01T00:00:00Z

-44.06 112.99 -9.99 154.0

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