O HydroSHEDS é um produto de mapeamento que fornece informações hidrográficas para aplicativos regionais e globais em um formato consistente. Ele oferece um conjunto de dados georreferenciados (vetor e raster) em várias escalas, incluindo redes de rios, limites de bacias hidrográficas, direções de drenagem e acúmulos de fluxo. O HydroSHEDS é baseado em dados de elevação obtidos em 2000 pela Missão de Topografia por Radar do Ônibus Espacial (SRTM, na sigla em inglês) da NASA.
Esse conjunto de dados de elevação preenchido com vazios é a primeira etapa para produzir os conjuntos de dados de DEM condicionados. Picos e depressões nos dados do SRTM foram detectados e anulados. Pequenos vazios foram preenchidos por interpolação das elevações ao redor. O oceano foi definido como uma elevação de 0 metro, e lagos, ilhas e rios foram preenchidos usando outras técnicas. Todos os detalhes do modelo digital de elevação subjacente estão disponíveis no site e na documentação do HydroSHEDS.
Esse conjunto de dados tem resolução de 3 segundos de arco. Os conjuntos de dados disponíveis em 3 segundos de arco são o DEM preenchido com vazios, o DEM condicionado hidrologicamente e a direção de drenagem (fluxo).
A qualidade dos dados do HydroSHEDS é significativamente menor para regiões acima de 60 graus de latitude norte, já que não há dados de elevação do SRTM disponíveis. Por isso, foi usado um DEM de resolução mais baixa (HYDRO1k fornecido pelo USGS).
O HydroSHEDS foi desenvolvido pelo Programa de Ciência da Conservação do World Wildlife Fund (WWF) em parceria com o Serviço Geológico dos EUA, o Centro Internacional de Agricultura Tropical, a Nature Conservancy e o Centro de Pesquisa de Sistemas Ambientais da Universidade de Kassel, na Alemanha.
Bandas
Tamanho do pixel 92,77 metros
Bandas
Nome
Unidades
Mín.
Máx.
Tamanho do pixel
Descrição
b1
m
-424*
8642*
metros
Elevação
* valor mínimo ou máximo estimado
Termos de Uso
Termos de Uso
Os dados do HydroSHEDS são sem custo financeiro para uso não comercial e comercial. Para mais informações, consulte o contrato de licença.
Citações
Citações:
Lehner, B., Verdin, K., Jarvis, A. (2008): New global hydrography
derived from spaceborne elevation data. Eos, Transactions, AGU,
89(10): 93-94.
O HydroSHEDS é um produto de mapeamento que fornece informações hidrográficas para aplicativos regionais e globais em um formato consistente. Ele oferece um conjunto de dados georreferenciados (vetoriais e raster) em várias escalas, incluindo redes de rios, limites de bacias hidrográficas, direções de drenagem e acúmulos de fluxo. O HydroSHEDS se baseia em dados de elevação obtidos em 2000…
[null,null,[],[[["\u003cp\u003eHydroSHEDS provides hydrographic information like river networks, watershed boundaries, and drainage directions at various scales.\u003c/p\u003e\n"],["\u003cp\u003eIt is a void-filled elevation dataset based on SRTM data from 2000 with a resolution of 3 arc-seconds (approximately 92.77 meters).\u003c/p\u003e\n"],["\u003cp\u003eData quality is lower above 60 degrees northern latitude due to the lack of underlying SRTM data.\u003c/p\u003e\n"],["\u003cp\u003eHydroSHEDS is free for non-commercial and commercial use under the specified license agreement.\u003c/p\u003e\n"],["\u003cp\u003eDeveloped by WWF in partnership with USGS and other organizations.\u003c/p\u003e\n"]]],["The HydroSHEDS dataset, provided by WWF, offers hydrographic data derived from NASA's 2000 SRTM elevation data. It includes void-filled DEM, Hydrologically Conditioned DEM, and Drainage (Flow) Direction at a 3 arc-second resolution. The data provides consistent geo-referenced datasets, including river networks, watershed boundaries, and flow accumulations. It's accessible through Google Earth Engine, and usable for commercial and non-commercial projects, but quality decreases above 60 degrees northern latitude.\n"],null,["# WWF HydroSHEDS Void-Filled DEM, 3 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 [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) \nvoid-filled \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 void-filled elevation dataset is the first step\ntowards producing the conditioned DEM datasets. Spikes and wells\nin the SRTM data were detected and voided out. Small voids were\nfilled by interpolation of surrounding elevations. The ocean\nwas set to an elevation of 0 meters, and lakes, islands, and\nrivers were filled using other techniques. Full details of the\nunderlying digital elevation model are available in the HydroSHEDS\nwebsite and documentation.\n\nThis dataset is at 3 arc-second\nresolution. The datasets available at 3 arc-seconds are the Void-Filled\nDEM, Hydrologically Conditioned DEM, and Drainage (Flow) Direction.\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\n92.77 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|------|-------|--------|--------|------------|-------------|\n| `b1` | m | -424\\* | 8642\\* | 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/03VFDEM');\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_03VFDEM) \n[WWF HydroSHEDS Void-Filled DEM, 3 Arc-Seconds](/earth-engine/datasets/catalog/WWF_HydroSHEDS_03VFDEM) \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/03VFDEM, 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_03VFDEM)"]]
