HydroSHEDS는 일관된 형식으로 지역 및 전역 규모 애플리케이션에 수문학 정보를 제공하는 매핑 제품입니다. 하천 네트워크, 유역 경계, 배수 방향, 흐름 누적 등 다양한 규모의 지리 참조 데이터 세트 (벡터 및 래스터)를 제공합니다. HydroSHEDS는 2000년에 NASA의 셔틀 레이더 지형 임무 (SRTM)에서 획득한 고도 데이터를 기반으로 합니다.
수문학적으로 조건화된 이 고도 데이터 세트는 반복적인 조건화 및 수정 프로세스의 결과입니다.
컨디셔닝 프로세스는 원래 DEM을 변경하므로 배수 방향을 파생하는 것 외의 애플리케이션에는 부정확할 수 있습니다. 내륙 싱크인 내륙 유역은 흐름을 종료하기 위해 가장 낮은 지점에 데이터 없음 셀로 '시드'됩니다. 기본 디지털 고도 모델에 관한 자세한 내용은 HydroSHEDS 웹사이트와 문서에서 확인할 수 있습니다.
이 데이터 세트는 30초 각도 해상도입니다. 30초에서 사용할 수 있는 데이터 세트는 수문학적으로 조건화된 DEM, 배수(흐름) 방향, 흐름 누적입니다.
기본 SRTM 고도 데이터를 사용할 수 없어 더 조잡한 해상도의 DEM (USGS에서 제공한 HYDRO1k)이 사용되었기 때문에 북위 60도 이상의 지역에서는 HydroSHEDS 데이터의 품질이 크게 낮습니다.
HydroSHEDS는 세계자연기금 (WWF) 보존 과학 프로그램이 미국 지질조사국, 국제 열대 농업 센터, 네이처 컨서번시, 독일 카셀 대학교 환경 시스템 연구 센터와 협력하여 개발했습니다.
대역
픽셀 크기 927.67미터
대역
이름
단위
최소
최대
픽셀 크기
설명
b1
m
-415*
8247*
미터
고도
* 예상 최솟값 또는 최댓값
이용약관
이용약관
HydroSHEDS 데이터는 비상업적 및 상업적 용도로 무료로 사용할 수 있습니다. 자세한 내용은 라이선스 계약을 참고하세요.
인용
인용:
Lehner, B., Verdin, K., Jarvis, A. (2008): New global hydrography
derived from spaceborne elevation data. Eos, Transactions, AGU,
89(10): 93-94.
HydroSHEDS는 지역 및 전 세계 규모 애플리케이션에 수문학 정보를 일관된 형식으로 제공하는 매핑 제품입니다. 하천 네트워크, 유역 경계, 배수 방향, 흐름 누적 등 다양한 규모의 지리 참조 데이터 세트 (벡터 및 래스터)를 제공합니다. HydroSHEDS는 2000년에 획득한 고도 데이터를 기반으로 합니다.
[null,null,[],[[["\u003cp\u003eHydroSHEDS provides hydrographic information like river networks, watershed boundaries, and flow accumulations globally at various scales.\u003c/p\u003e\n"],["\u003cp\u003eIt's based on NASA's SRTM elevation data (from 2000) and has been hydrologically conditioned, making it suitable for drainage analysis.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is available at a 30 arc-second resolution (approximately 927 meters) and includes a hydrologically conditioned DEM.\u003c/p\u003e\n"],["\u003cp\u003eData quality is lower above 60 degrees northern latitude due to the reliance on coarser-resolution DEM in those areas.\u003c/p\u003e\n"],["\u003cp\u003eHydroSHEDS data is free for both non-commercial and commercial use under the specified license agreement.\u003c/p\u003e\n"]]],["The HydroSHEDS dataset, provided by WWF, offers hydrographic data, including river networks and watershed boundaries, from February 11-22, 2000. Derived from NASA's SRTM elevation data, the dataset is conditioned for drainage direction analysis, but is less reliable above 60 degrees north. It is accessible through Google Earth Engine using the snippet `ee.Image(\"WWF/HydroSHEDS/30CONDEM\")`. The hydrologically conditioned DEM (b1) has a 927.67-meter pixel size, with elevations ranging from -415 to 8247 meters. Data is free for both commercial and non-commercial use.\n"],null,["# WWF HydroSHEDS Hydrologically Conditioned DEM, 30 Arc-Seconds\n\nDataset Availability\n: 2000-02-11T00:00:00Z--2000-02-22T00:00:00Z\n\nDataset Provider\n:\n\n\n [WWF](https://www.hydrosheds.org/)\n\nTags\n:\n[conditioned](/earth-engine/datasets/tags/conditioned) [dem](/earth-engine/datasets/tags/dem) [elevation](/earth-engine/datasets/tags/elevation) [geophysical](/earth-engine/datasets/tags/geophysical) [hydrography](/earth-engine/datasets/tags/hydrography) [hydrology](/earth-engine/datasets/tags/hydrology) [hydrosheds](/earth-engine/datasets/tags/hydrosheds) [srtm](/earth-engine/datasets/tags/srtm) [surface-ground-water](/earth-engine/datasets/tags/surface-ground-water) [topography](/earth-engine/datasets/tags/topography) [water](/earth-engine/datasets/tags/water) [wwf](/earth-engine/datasets/tags/wwf) \n\n#### Description\n\nHydroSHEDS is a mapping product that provides hydrographic\ninformation for regional and global-scale applications in a consistent\nformat. It offers a suite of geo-referenced datasets (vector and\nraster) at various scales, including river networks, watershed\nboundaries, drainage directions, and flow accumulations. HydroSHEDS\nis based on elevation data obtained in 2000 by NASA's Shuttle Radar\nTopography Mission (SRTM).\n\nThis hydrologically conditioned elevation dataset is\nthe result of an iterative conditioning and correction process.\nNote that the conditioning process alters the original DEM and\nmay render it incorrect for applications other than deriving drainage\ndirections. Endorheic basins (inland sinks) are ''seeded'' with\na no-data cell at their lowest point in order to terminate the\nflow. Full details of the underlying digital elevation model are\navailable in the HydroSHEDS website and documentation.\n\nThis dataset is at 30 arc-second resolution. The datasets available\nat 30 arc-seconds are the Hydrologically Conditioned DEM, Drainage\n(Flow) Direction, and Flow Accumulation.\n\nNote that the quality of the HydroSHEDS data is significantly lower for regions above\n60 degrees northern latitude as there is no underlying SRTM elevation data available\nand thus a coarser-resolution DEM was (HYDRO1k provided by USGS).\n\nHydroSHEDS was developed by the World Wildlife Fund (WWF)\nConservation Science Program in partnership with the U.S. Geological\nSurvey, the International Centre for Tropical Agriculture, The\nNature Conservancy, and the Center for Environmental Systems Research\nof the University of Kassel, Germany.\n\n### Bands\n\n\n**Pixel Size**\n\n927.67 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|------|-------|--------|--------|------------|-------------|\n| `b1` | m | -415\\* | 8247\\* | meters | Elevation |\n\n\\* estimated min or max value\n\n### Terms of Use\n\n**Terms of Use**\n\nHydroSHEDS data are free for non-commercial and commercial\nuse. For more information, please refer to the [License Agreement](https://www.hydrosheds.org/page/license).\n\n### Citations\n\nCitations:\n\n- Lehner, B., Verdin, K., Jarvis, A. (2008): New global hydrography\n derived from spaceborne elevation data. Eos, Transactions, AGU,\n 89(10): 93-94.\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('WWF/HydroSHEDS/30CONDEM');\nvar elevation = dataset.select('b1');\nvar elevationVis = {\n min: -50.0,\n max: 3000.0,\n gamma: 2.0,\n};\nMap.setCenter(-121.652, 38.022, 8);\nMap.addLayer(elevation, elevationVis, 'Elevation');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/WWF/WWF_HydroSHEDS_30CONDEM) \n[WWF HydroSHEDS Hydrologically Conditioned DEM, 30 Arc-Seconds](/earth-engine/datasets/catalog/WWF_HydroSHEDS_30CONDEM) \nHydroSHEDS 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 ... \nWWF/HydroSHEDS/30CONDEM, conditioned,dem,elevation,geophysical,hydrography,hydrology,hydrosheds,srtm,surface-ground-water,topography,water,wwf \n2000-02-11T00:00:00Z/2000-02-22T00:00:00Z \n-67.3 -180 60 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.hydrosheds.org/)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/WWF_HydroSHEDS_30CONDEM)"]]
