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.
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. …
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eThe Hydrologically Enforced Digital Elevation Model (DEM-H) of Australia was derived from NASA's SRTM data and has been hydrologically conditioned for drainage enforcement.\u003c/p\u003e\n"],["\u003cp\u003eDEM-H supports hydrological analysis, such as catchment definition and flow routing, by capturing flow paths based on SRTM elevations and mapped stream lines.\u003c/p\u003e\n"],["\u003cp\u003eThis DEM, with a resolution of 30.92 meters, covers Australia and has a Creative Commons Attribution 4.0 license.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset was produced by Geoscience Australia and is available in Earth Engine with an elevation band ranging from approximately -31 to 2223 meters.\u003c/p\u003e\n"]]],[],null,["# DEM-H: Australian SRTM Hydrologically Enforced Digital Elevation Model\n\nDataset Availability\n: 2010-02-01T00:00:00Z--2010-02-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [Geoscience Australia](https://www.ga.gov.au/metadata-gateway/metadata/record/72759/)\n\nTags\n:\n[australia](/earth-engine/datasets/tags/australia) [dem](/earth-engine/datasets/tags/dem) [elevation](/earth-engine/datasets/tags/elevation) [elevation-topography](/earth-engine/datasets/tags/elevation-topography) [ga](/earth-engine/datasets/tags/ga) [geophysical](/earth-engine/datasets/tags/geophysical) [geoscience-australia](/earth-engine/datasets/tags/geoscience-australia) [smoothed](/earth-engine/datasets/tags/smoothed) [srtm](/earth-engine/datasets/tags/srtm) \n\n#### Description\n\nThe Hydrologically Enforced Digital Elevation Model\n(DEM-H) was derived from the SRTM data acquired by NASA in February\n2000. The model has been hydrologically conditioned and drainage\nenforced. The DEM-H captures flow paths based on SRTM elevations\nand mapped stream lines, and supports delineation of catchments\nand related hydrological attributes. The dataset was derived from\nthe 1 second smoothed Digital Elevation Model (DEM-S; ANZCW0703014016)\nby enforcing hydrological connectivity with the ANUDEM software,\nusing selected AusHydro V1.6 (February 2010) 1:250,000 scale watercourse\nlines (ANZCW0503900101) and lines derived from DEM-S to define\nthe watercourses. The drainage enforcement has produced a consistent\nrepresentation of hydrological connectivity with some elevation\nartifacts resulting from the drainage enforcement. A full description\nof the methods is in preparation (Dowling et al., in prep).\n\nThis product provides a DEM suitable for use in hydrological analysis\nsuch as catchment definition and flow routing.\n\nThere are several areas with unexpected negative values: close to\nCanberra around (150.443044, -35.355281) with values of -55 and in Western\nAustralia around (124.84, -16.44) with -43.\n\n### Bands\n\n\n**Pixel Size**\n\n30.92 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|-------------|-------|----------|-----------|------------|-------------|\n| `elevation` | m | -31.37\\* | 2223.24\\* | meters | Elevation |\n\n\\* estimated min or max value\n\n### Terms of Use\n\n**Terms of Use**\n\n[CC-BY-4.0](https://spdx.org/licenses/CC-BY-4.0.html)\n\n### Citations\n\nCitations:\n\n- Geoscience Australia, 2015. Digital Elevation Model (DEM) of Australia\n derived from LiDAR 5 Metre Grid. Geoscience Australia, Canberra.\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.Image('AU/GA/DEM_1SEC/v10/DEM-H');\nvar elevation = dataset.select('elevation');\nvar elevationVis = {\n min: -10.0,\n max: 1300.0,\n palette: [\n '3ae237', 'b5e22e', 'd6e21f', 'fff705', 'ffd611', 'ffb613', 'ff8b13',\n 'ff6e08', 'ff500d', 'ff0000', 'de0101', 'c21301', '0602ff', '235cb1',\n '307ef3', '269db1', '30c8e2', '32d3ef', '3be285', '3ff38f', '86e26f'\n ],\n};\nMap.setCenter(133.95, -24.69, 5);\nMap.addLayer(elevation, elevationVis, 'Elevation');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/AU/AU_GA_DEM_1SEC_v10_DEM-H) \n[DEM-H: Australian SRTM Hydrologically Enforced Digital Elevation Model](/earth-engine/datasets/catalog/AU_GA_DEM_1SEC_v10_DEM-H) \nThe 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. ... \nAU/GA/DEM_1SEC/v10/DEM-H, australia,dem,elevation,elevation-topography,ga,geophysical,geoscience-australia,smoothed,srtm \n2010-02-01T00:00:00Z/2010-02-01T00:00:00Z \n-44.06 112.99 -9.99 154 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.ga.gov.au/metadata-gateway/metadata/record/72759/)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/AU_GA_DEM_1SEC_v10_DEM-H)"]]
