HydroSHEDS è un prodotto di mappatura che fornisce informazioni idrografiche per applicazioni su scala regionale e globale in un formato coerente. Offre una suite di set di dati georeferenziati (vettoriali e raster) a varie scale, tra cui reti fluviali, confini dei bacini idrografici, direzioni di drenaggio e accumuli di flusso. HydroSHEDS
si basa sui dati di elevazione ottenuti nel 2000 dalla Shuttle Radar
Topography Mission (SRTM) della NASA.
Questo set di dati sull'elevazione con riempimento del vuoto è il primo passo
verso la produzione dei set di dati DEM condizionati. Sono stati rilevati e annullati picchi e depressioni
nei dati SRTM. I piccoli vuoti sono stati
riempiti mediante l'interpolazione delle elevazioni circostanti. L'oceano
è stato impostato a un'altitudine di 0 metri e laghi, isole e
fiumi sono stati riempiti utilizzando altre tecniche. I dettagli completi del
modello digitale di elevazione sottostante sono disponibili nel sito web e nella documentazione di HydroSHEDS.
Questo set di dati ha una risoluzione di 3 secondi d'arco. I set di dati disponibili a 3 secondi d'arco sono DEM con riempimento dei vuoti, DEM con correzione idrologica e direzione di drenaggio (flusso).
Tieni presente che la qualità dei dati HydroSHEDS è notevolmente inferiore per le regioni sopra
i 60 gradi di latitudine nord, in quanto non sono disponibili dati di elevazione SRTM sottostanti
e quindi è stato utilizzato un DEM a risoluzione più grossolana (HYDRO1k fornito dall'USGS).
HydroSHEDS è stato sviluppato dal programma di scienze della conservazione del World Wildlife Fund (WWF) in collaborazione con l'U.S. Geological Survey, l'International Centre for Tropical Agriculture, The Nature Conservancy e il Center for Environmental Systems Research dell'Università di Kassel, in Germania.
Bande
Dimensioni pixel 92,77 metri
Bande
Nome
Unità
Min
Max
Dimensioni dei pixel
Descrizione
b1
m
-424*
8642*
metri
Elevazione
* valore minimo o massimo stimato
Termini e condizioni d'uso
Termini e condizioni d'uso
I dati HydroSHEDS sono senza costi per uso non commerciale e commerciale. Per ulteriori informazioni, consulta il contratto di licenza.
Citazioni
Citazioni:
Lehner, B., Verdin, K., Jarvis, A. (2008): New global hydrography
derived from spaceborne elevation data. Eos, Transactions, AGU,
89(10): 93-94.
HydroSHEDS è un prodotto di mappatura che fornisce informazioni idrografiche per applicazioni a livello regionale e globale in un formato coerente. Offre una suite di set di dati georeferenziati (vettoriali e raster) a varie scale, tra cui reti fluviali, confini dei bacini idrografici, direzioni di drenaggio e accumuli di flusso. HydroSHEDS si basa su dati di elevazione ottenuti nel 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)"]]
