ArcticDEM est une initiative public-privé de la National Geospatial-Intelligence Agency (NGA) et de la National Science Foundation (NSF) visant à produire automatiquement un modèle numérique de surface (DSM) haute résolution et de haute qualité de l'Arctique à l'aide d'images stéréoscopiques optiques, du calcul hautes performances et d'un logiciel de photogrammétrie Open Source. Il inclut la végétation, la canopée, les bâtiments et d'autres éléments de surface créés par l'homme. L'élément de 2 mètres est une collection de bandes plutôt qu'une mosaïque unique en raison des différences de projection entre les bandes.
Les fichiers DEM de bandes correspondent à la zone de chevauchement des bandes d'images stéréoscopiques d'entrée telles qu'elles sont collectées par la constellation de satellites en orbite polaire de DigitalGlobe. Les dimensions des bandes de DEM varient en fonction du capteur satellite qui a acquis les images et de l'angle hors nadir de la collecte. La plupart des bandes ont une largeur comprise entre 16 et 18 km, et une longueur comprise entre 110 et 120 km.
Bracelets
Taille des pixels mètres
Bandes de fréquences
Nom
Unités
Taille des pixels
Description
elevation
m
mètres
Élévation
matchtag
mètres
Raster de masque de bits indiquant le traitement des pixels du MNT
Masque de bits pour matchtag
Bit 0 : traitement des pixels
0 : les pixels ont été interpolés.
1 : Les pixels sont issus d'une correspondance stéréo
Conditions d'utilisation
Conditions d'utilisation
La politique de la National Science Foundation (principale source de financement du PGC) exige que les chercheurs reconnaissent le soutien de la NSF dans toutes les publications, pages Web et interviews médiatiques.
En utilisant les données PGC dans Earth Engine, les utilisateurs acceptent de citer le PGC et son financement par la NSF. La source d'origine de toutes les données tierces fournies par le PGC doit également être correctement attribuée.
ArcticDEM est une initiative public-privé de la National Geospatial-Intelligence Agency (NGA) et de la National Science Foundation (NSF) visant à produire automatiquement un modèle numérique de surface (DSM) haute résolution et de haute qualité de l'Arctique à l'aide d'images stéréoscopiques optiques, du calcul haute performance et d'un logiciel de photogrammétrie Open Source. Il inclut la végétation, la canopée, les bâtiments et d'autres éléments de surface créés par l'homme. Le…
[null,null,[],[[["\u003cp\u003eArcticDEM provides a high-resolution (2m) digital surface model (DSM) of the Arctic, including vegetation, buildings, and other surface features.\u003c/p\u003e\n"],["\u003cp\u003eIt is created from optical stereo imagery using high-performance computing and open source photogrammetry software.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is a collection of strips covering the Arctic region from 2009 to 2017, with varying dimensions depending on the satellite sensor and collection angle.\u003c/p\u003e\n"],["\u003cp\u003eUsers must acknowledge NSF support and cite PGC when using this data, as per the terms of use.\u003c/p\u003e\n"],["\u003cp\u003eData can be explored and analyzed using Google Earth Engine, a platform for scientific analysis and visualization of geospatial datasets.\u003c/p\u003e\n"]]],["The ArcticDEM dataset, provided by the University of Minnesota Polar Geospatial Center, offers a high-resolution digital surface model (DSM) of the Arctic from 2009 to 2017. Utilizing stereo imagery and photogrammetry, it captures surface features with a 2-meter pixel size. Data is in strips and includes elevation data and a matchtag for pixel processing information. The dataset, accessible via Google Earth Engine, requires NSF acknowledgment and appropriate citations for use.\n"],null,["# ArcticDEM Strips\n\nDataset Availability\n: 2009-08-16T00:00:00Z--2017-03-12T00:00:00Z\n\nDataset Provider\n:\n\n\n [University of Minnesota Polar Geospatial Center](https://www.pgc.umn.edu/data/arcticdem/)\n\nTags\n:\n[arctic](/earth-engine/datasets/tags/arctic) [dem](/earth-engine/datasets/tags/dem) [elevation-topography](/earth-engine/datasets/tags/elevation-topography) [geophysical](/earth-engine/datasets/tags/geophysical) [pgc](/earth-engine/datasets/tags/pgc) [umn](/earth-engine/datasets/tags/umn) \n\n#### Description\n\nArcticDEM is a National Geospatial-Intelligence Agency (NGA) and National\nScience Foundation (NSF) public-private initiative to automatically produce\na high-resolution, high-quality digital surface model (DSM) of the Arctic\nusing optical stereo imagery, high-performance computing, and open source\nphotogrammetry software. It includes vegetation, tree canopy, buildings, and\nother man-made surface features. The 2m asset is a collection of strips rather\nthan a single mosaic due to projection differences between strips.\n\nStrip DEM files correspond to the overlapping area of the input stereopair\nimage swaths as they are collected by DigitalGlobe's constellation of\npolar-orbiting satellites. Strip DEM dimensions will vary according to the\nsatellite sensor that acquired the images and the off-nadir angle of\ncollection. Most strips are between 16km and 18km in width, and 110km and\n120km in length.\n\n### Bands\n\n\n**Pixel Size**\n\n2 meters\n\n**Bands**\n\n| Name | Units | Pixel Size | Description |\n|-------------|-------|------------|-------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `elevation` | m | meters | Elevation |\n| `matchtag` | | meters | Bitmask raster indicating DEM pixels processing |\n| Bitmask for matchtag - Bit 0: Pixel processing - 0: Pixels have been interpolated - 1: Pixels are derived from a stereo match ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n### Terms of Use\n\n**Terms of Use**\n\nNational Science Foundation (PGC's primary funding source) policy requires\nresearchers to acknowledge NSF support in all publications, web pages, and\nmedia interviews.\n\nBy using PGC data in Earth Engine, users agree to cite PGC\nand its sponsorship by the NSF. The original source of any third-party data\nsupplied by PGC must also be properly attributed.\n\nFor more information see the PGC's\n[Acknowledgement Policy](https://www.pgc.umn.edu/guides/user-services/acknowledgement-policy/).\n\n### Citations\n\nCitations:\n\n- DEM(s) created by the Polar Geospatial Center from DigitalGlobe, Inc. imagery.\n Porter, Claire; Morin, Paul; Howat, Ian; Noh, Myoung-Jon; Bates, Brian;\n Peterman, Kenneth; Keesey, Scott; Schlenk, Matthew; Gardiner, Judith;\n Tomko, Karen; Willis, Michael; Kelleher, Cole; Cloutier, Michael; Husby, Eric;\n Foga, Steven; Nakamura, Hitomi; Platson, Melisa; Wethington, Michael, Jr.;\n Williamson, Cathleen; Bauer, Gregory; Enos, Jeremy; Arnold, Galen; Kramer, William;\n Becker, Peter; Doshi, Abhijit; D'Souza, Cristelle; Cummens, Pat; Laurier, Fabien;\n Bojesen, Mikkel, 2018, ArcticDEM, Harvard Dataverse, V1, \\[Date Accessed\\].\n\n### DOIs\n\n- \u003chttps://doi.org/10.7910/DVN/OHHUKH\u003e\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.ImageCollection('UMN/PGC/ArcticDEM/V3/2m');\nvar elevation = dataset.select('elevation');\nvar elevationVis = {\n min: -50.0,\n max: 1000.0,\n palette: ['0d13d8', '60e1ff', 'ffffff'],\n};\nMap.setCenter(-63.402, 66.368, 7);\nMap.addLayer(elevation, elevationVis, 'Elevation');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/UMN/UMN_PGC_ArcticDEM_V3_2m) \n[ArcticDEM Strips](/earth-engine/datasets/catalog/UMN_PGC_ArcticDEM_V3_2m) \nArcticDEM is a National Geospatial-Intelligence Agency (NGA) and National Science Foundation (NSF) public-private initiative to automatically produce a high-resolution, high-quality digital surface model (DSM) of the Arctic using optical stereo imagery, high-performance computing, and open source photogrammetry software. It includes vegetation, tree canopy, buildings, and other man-made surface features. The ... \nUMN/PGC/ArcticDEM/V3/2m, arctic,dem,elevation-topography,geophysical,pgc,umn \n2009-08-16T00:00:00Z/2017-03-12T00:00:00Z \n50 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.7910/DVN/OHHUKH](https://doi.org/https://www.pgc.umn.edu/data/arcticdem/)\n- [https://doi.org/10.7910/DVN/OHHUKH](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/UMN_PGC_ArcticDEM_V3_2m)"]]
