HydroSHEDS adalah produk pemetaan yang menyediakan informasi hidrografis untuk aplikasi skala regional dan global dalam format yang konsisten. Platform ini menawarkan serangkaian set data yang direferensikan secara geografis (vektor dan raster) dalam berbagai skala, termasuk jaringan sungai, batas daerah aliran sungai, arah drainase, dan akumulasi aliran. HydroSHEDS
didasarkan pada data elevasi yang diperoleh pada tahun 2000 oleh Shuttle Radar
Topography Mission (SRTM) NASA.
Set data akumulasi aliran ini menentukan jumlah area hulu (dalam jumlah sel) yang mengalir ke setiap sel. Lapisan arah drainase digunakan untuk menentukan sel mana yang mengalir ke sel target. Jumlah sel yang terakumulasi pada dasarnya merupakan
ukuran area tangkapan di hulu. Namun, karena ukuran sel set data HydroSHEDS bergantung pada lintang, nilai akumulasi sel tidak dapat langsung diterjemahkan ke dalam area drainase dalam kilometer persegi. Nilai berkisar dari 1 di dataran tinggi topografi (sumber sungai) hingga angka yang sangat besar (dalam urutan jutaan sel) di muara sungai besar.
Set data ini memiliki resolusi 30 detik busur. Set data yang tersedia pada 30 detik busur adalah DEM yang Dikondisikan secara Hidrologis, Arah Saluran Pembuangan (Aliran), dan Akumulasi Aliran.
Perhatikan bahwa kualitas data HydroSHEDS jauh lebih rendah untuk wilayah di atas 60 derajat lintang utara karena tidak ada data elevasi SRTM yang mendasarinya dan dengan demikian DEM beresolusi lebih kasar digunakan (HYDRO1k yang disediakan oleh USGS).
HydroSHEDS dikembangkan oleh Program Ilmu Konservasi World Wildlife Fund (WWF) dalam kemitraan dengan U.S. Geological Survey, International Centre for Tropical Agriculture, The Nature Conservancy, dan Center for Environmental Systems Research of the University of Kassel, Jerman.
Band
Ukuran Piksel 927,67 meter
Band
Nama
Min
Maks
Ukuran Piksel
Deskripsi
b1
1*
6.96575e+06*
meter
Akumulasi alur
* perkiraan nilai min atau maks
Persyaratan Penggunaan
Persyaratan Penggunaan
Data HydroSHEDS gratis untuk penggunaan non-komersial dan komersial. Untuk mengetahui informasi selengkapnya, lihat Perjanjian Lisensi.
Kutipan
Kutipan:
Lehner, B., Verdin, K. Jarvis, A. (2008): New global hydrography
derived from spaceborne elevation data. Eos, Transactions, AGU,
89(10): 93-94.
HydroSHEDS adalah produk pemetaan yang memberikan informasi hidrografi untuk aplikasi skala regional dan global dalam format yang konsisten. Platform ini menawarkan serangkaian set data yang direferensikan secara geografis (vektor dan raster) dalam berbagai skala, termasuk jaringan sungai, batas daerah aliran sungai, arah drainase, dan akumulasi aliran. HydroSHEDS didasarkan pada data elevasi yang diperoleh pada tahun 2000 …
[null,null,[],[[["\u003cp\u003eHydroSHEDS is a mapping product providing hydrographic information (river networks, watershed boundaries, etc.) at various scales for regional and global applications.\u003c/p\u003e\n"],["\u003cp\u003eIt uses flow accumulation to define the amount of upstream area draining into each cell, essentially measuring the upstream catchment area.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is based on elevation data from NASA's Shuttle Radar Topography Mission (SRTM) collected in 2000 and is available at 30 arc-second resolution.\u003c/p\u003e\n"],["\u003cp\u003eData quality is lower above 60 degrees northern latitude due to reliance on a coarser-resolution DEM.\u003c/p\u003e\n"],["\u003cp\u003eHydroSHEDS data are 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, watershed boundaries, drainage directions, and flow accumulations, based on 2000 SRTM elevation data. The flow accumulation dataset, at 30 arc-second resolution, quantifies the upstream area draining into each cell, with values ranging from topographic highs to river mouths. Data quality diminishes above 60 degrees north latitude. The dataset is freely available for commercial and non-commercial usage.\n"],null,["# WWF HydroSHEDS Flow Accumulation, 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[accumulation](/earth-engine/datasets/tags/accumulation) [drainage](/earth-engine/datasets/tags/drainage) [flow](/earth-engine/datasets/tags/flow) [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) [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 flow accumulation dataset defines the amount of\nupstream area (in number of cells) draining into each cell. The\ndrainage direction layer is used to define which cells flow into\nthe target cell. The number of accumulated cells is essentially\na measure of the upstream catchment area. However, since the\ncell size of the HydroSHEDS data set depends on latitude, the\ncell accumulation value cannot directly be translated into drainage\nareas in square kilometers. Values range from 1 at topographic\nhighs (river sources) to very large numbers (on the order of\nmillions of cells) at the mouths of large rivers.\n\nThis dataset\nis at 30 arc-second resolution. The datasets available at 30\narc-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 | Min | Max | Pixel Size | Description |\n|------|-----|---------------|------------|-------------------|\n| `b1` | 1\\* | 6.96575e+06\\* | meters | Flow accumulation |\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/30ACC');\nvar flowAccumulation = dataset.select('b1');\nvar flowAccumulationVis = {\n min: 0.0,\n max: 500.0,\n palette: [\n '000000', '023858', '006837', '1a9850', '66bd63', 'a6d96a', 'd9ef8b',\n 'ffffbf', 'fee08b', 'fdae61', 'f46d43', 'd73027'\n ],\n};\nMap.setCenter(-121.652, 38.022, 8);\nMap.addLayer(flowAccumulation, flowAccumulationVis, 'Flow Accumulation');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/WWF/WWF_HydroSHEDS_30ACC) \n[WWF HydroSHEDS Flow Accumulation, 30 Arc-Seconds](/earth-engine/datasets/catalog/WWF_HydroSHEDS_30ACC) \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/30ACC, accumulation,drainage,flow,geophysical,hydrography,hydrology,hydrosheds,srtm,surface-ground-water,water,wwf \n2000-02-11T00:00:00Z/2000-02-22T00:00:00Z \n-67.3 -180 62 180 \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_30ACC)"]]
