수문학적으로 적용된 디지털 고도 모델(DEM-H)은 2000년 2월 NASA에서 획득한 SRTM 데이터에서 파생되었습니다. 모델이 수문학적으로 조정되었으며 배수가 적용되었습니다. DEM-H는 SRTM 고도와 매핑된 하천을 기반으로 흐름 경로를 포착하고 유역과 관련 수문학적 속성의 구분을 지원합니다. 데이터 세트는 선택된 AusHydro V1.6 (2010년 2월) 1:250,000 규모 수로 선 (ANZCW0503900101)과 DEM-S에서 파생된 선을 사용하여 수로를 정의하고 ANUDEM 소프트웨어로 수문학적 연결을 적용하여 1초 평활 디지털 고도 모델 (DEM-S; ANZCW0703014016)에서 파생되었습니다. 배수 시행으로 수문학적 연결이 일관되게 표현되었으며 배수 시행으로 인해 일부 고도 아티팩트가 발생했습니다. 방법에 관한 전체 설명은 준비 중입니다 (Dowling 외, 준비 중).
이 제품은 유역 정의 및 흐름 라우팅과 같은 수문 분석에 적합한 DEM을 제공합니다.
예상치 못한 음수 값이 있는 영역이 몇 군데 있습니다. 캔버라 근처 (150.443044, -35.355281)에 -55 값이 있고 서부 오스트레일리아 근처 (124.84, -16.44)에 -43 값이 있습니다.
수문학적으로 적용된 디지털 고도 모델 (DEM-H)은 2000년 2월 NASA에서 획득한 SRTM 데이터에서 파생되었습니다. 모델이 수문학적으로 조건화되고 배수가 적용되었습니다. DEM-H는 SRTM 고도와 매핑된 하천을 기반으로 흐름 경로를 포착하고 유역과 관련 수문 속성의 구분을 지원합니다. …
[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)"]]