Il modello digitale di elevazione (DEM-H) con applicazione idrologica è stato derivato dai dati SRTM acquisiti dalla NASA nel febbraio 2000. Il modello è stato condizionato idrologicamente e il drenaggio
è stato applicato. Il DEM-H acquisisce i percorsi di flusso in base alle elevazioni SRTM
e alle linee di flusso mappate e supporta la delimitazione dei bacini
e degli attributi idrologici correlati. Il set di dati è stato derivato dal
modello digitale di elevazione (DEM-S; ANZCW0703014016) levigato di 1 secondo
imponendo la connettività idrologica con il software ANUDEM,
utilizzando linee di corsi d'acqua selezionate di AusHydro V1.6 (febbraio 2010) in scala 1:250.000 (ANZCW0503900101) e linee derivate da DEM-S per definire
i corsi d'acqua. L'applicazione del drenaggio ha prodotto una rappresentazione
coerente della connettività idrologica con alcuni artefatti
di elevazione derivanti dall'applicazione del drenaggio. Una descrizione completa
dei metodi è in preparazione (Dowling et al., in prep.).
Questo prodotto fornisce un DEM adatto all'uso nell'analisi idrologica, ad esempio la definizione del bacino idrografico e il routing del flusso.
Ci sono diverse aree con valori negativi imprevisti: vicino a
Canberra intorno a (150.443044, -35.355281) con valori di -55 e nell'Australia
occidentale intorno a (124.84, -16.44) con -43.
Il modello digitale di elevazione (DEM-H) con applicazione di vincoli idrologici è stato derivato dai dati SRTM acquisiti dalla NASA nel febbraio 2000. Il modello è stato condizionato idrologicamente e il drenaggio è stato applicato. Il DEM-H acquisisce i percorsi di flusso in base alle elevazioni SRTM e ai corsi d'acqua mappati e supporta la delimitazione dei bacini idrografici e degli attributi idrologici correlati. …
[null,null,[],[[["\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)"]]
