DEM-S: Australian Smoothed Digital Elevation Model

AU/GA/DEM_1SEC/v10/DEM-S
Dataset Availability
2010-02-01T00:00:00Z–2010-02-01T00:00:00Z
Dataset Provider
Earth Engine Snippet
ee.Image("AU/GA/DEM_1SEC/v10/DEM-S")
Tags
australia dem elevation ga geophysical geoscience-australia smoothed srtm

Description

The Smoothed Digital Elevation Model (DEM-S) was derived from the SRTM data acquired by NASA in February 2000. DEM-S represents ground surface topography (excluding vegetation features) and has been smoothed to reduce noise and improve the representation of surface shape. An adaptive process applied more smoothing in flatter areas than hilly areas, and more smoothing in noisier areas than in less noisy areas.

This DEM-S supports calculation of local terrain shape attributes such as slope, aspect, and curvature that could not be reliably derived from the unsmoothed 1 second DEM because of noise.

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 -73.31* 2224.32*

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.

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.Image('AU/GA/DEM_1SEC/v10/DEM-S');
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
The Smoothed Digital Elevation Model (DEM-S) was derived from the SRTM data acquired by NASA in February 2000. DEM-S represents ground surface topography (excluding vegetation features) and has been smoothed to reduce noise and improve the representation of surface shape. An adaptive process applied more smoothing in flatter areas than …
AU/GA/DEM_1SEC/v10/DEM-S, 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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