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 di elevazione con condizionamento idrologico è il risultato di un processo iterativo di condizionamento e correzione. Tieni presente che il processo di condizionamento altera il DEM originale e potrebbe renderlo errato per applicazioni diverse dalla derivazione delle direzioni di drenaggio. Le conche endoreiche (bacini chiusi) vengono "seminate" con una cella senza dati nel punto più basso per interrompere il flusso. 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 15 secondi d'arco. I set di dati disponibili a 15 secondi d'arco sono il DEM con condizioni idrologiche, la direzione del drenaggio (flusso) e l'accumulo di 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 in pixel 463,83 metri
Bande
Nome
Unità
Min
Max
Dimensioni dei pixel
Descrizione
b1
m
-415*
8454*
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 flow accumulations at various scales, derived from NASA's SRTM elevation data.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset features a hydrologically conditioned DEM at 15 arc-second resolution, but the conditioning may impact its accuracy for non-hydrological uses.\u003c/p\u003e\n"],["\u003cp\u003eData quality is lower above 60 degrees northern latitude due to the use of coarser-resolution DEM data in those areas.\u003c/p\u003e\n"],["\u003cp\u003eHydroSHEDS data are freely available for both non-commercial and commercial use under the specified license agreement.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset was developed by WWF in partnership with USGS, CIAT, TNC, and the University of Kassel.\u003c/p\u003e\n"]]],["The WWF HydroSHEDS dataset, derived from 2000 SRTM elevation data, provides hydrographic information like river networks, watershed boundaries, and flow accumulation at a 15 arc-second resolution. It uses a hydrologically conditioned Digital Elevation Model (DEM), available from February 11-22, 2000. The data, free for commercial and non-commercial use, can be accessed via Google Earth Engine, and contains elevation data, ranging from -415 to 8454 meters. The dataset quality decreases above 60 degrees north latitude.\n"],null,["# WWF HydroSHEDS Hydrologically Conditioned DEM, 15 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 the result of an iterative conditioning and correction process. Note that the conditioning process alters the original DEM and may render it incorrect for applications other than deriving drainage directions. Endorheic basins (inland sinks) are 'seeded' with a no-data cell at their lowest point in order to terminate the flow. Full details of the underlying digital elevation model are available in the HydroSHEDS website and documentation.\n\nThis dataset is at 15 arc-second resolution. The datasets available at 15 arc-seconds are the Hydrologically Conditioned DEM, Drainage (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\n463.83 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|------|-------|--------|--------|------------|-------------|\n| `b1` | m | -415\\* | 8454\\* | 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/15CONDEM');\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_15CONDEM) \n[WWF HydroSHEDS Hydrologically Conditioned DEM, 15 Arc-Seconds](/earth-engine/datasets/catalog/WWF_HydroSHEDS_15CONDEM) \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/15CONDEM, 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_15CONDEM)"]]
