WWF HydroSHEDS Hydrologically Conditioned DEM, 3 Arc-Seconds

WWF/HydroSHEDS/03CONDEM
Dataset Availability
2000-02-11T00:00:00 - 2000-02-22T00:00:00
Dataset Provider
Earth Engine Snippet
ee.Image("WWF/HydroSHEDS/03CONDEM")
Tags
geophysical conditioned elevation dem topography wwf hydrosheds water hydrology hydrography srtm

Description

HydroSHEDS is a mapping product that provides hydrographic information for regional and global-scale applications in a consistent format. It offers a suite of geo-referenced datasets (vector and raster) at various scales, including river networks, watershed boundaries, drainage directions, and flow accumulations. HydroSHEDS is based on elevation data obtained in 2000 by NASA's Shuttle Radar Topography Mission (SRTM).

This hydrologically conditioned elevation dataset is the result of an iterative conditioning and correction process. Note that the conditioning process alters the original DEM and may render it incorrect for applications other than deriving drainage directions. Endorheic basins (inland sinks) are 'seeded' with a no-data cell at their lowest point in order to terminate the flow. Full details of the underlying digital elevation model are available in the HydroSHEDS website and documentation. This dataset is at 3 arc-second resolution. The datasets available at 3 arc-seconds are the Void-Filled DEM, Hydrologically Conditioned DEM, and Drainage (Flow) Direction.

There are two areas with incorrect negative values of -100 close to Vancouver, Canada around (50.16, -123.85) and Australia (-14.96, 129.62)

Bands

Resolution
3 arc seconds

Bands

Name Units Min Max Description
b1 Meters -440* 8527*

Elevation

* estimated min or max value

Terms of Use

Terms of Use

HydroSHEDS data are free for non-commercial and commercial use. For more information, please refer to the License Agreement.

Citations

Citations:
  • Lehner, B., Verdin, K., Jarvis, A. (2008): New global hydrography derived from spaceborne elevation data. Eos, Transactions, AGU, 89(10): 93-94.

Explore in Earth Engine

var dataset = ee.Image('WWF/HydroSHEDS/03CONDEM');
var elevation = dataset.select('b1');
var elevationVis = {
  min: -50.0,
  max: 3000.0,
  gamma: 2.0,
};
Map.setCenter(-121.652, 38.022, 8);
Map.addLayer(elevation, elevationVis, 'Elevation');