Este modelo digital de elevación (MDE) se construye a partir de una combinación de los MDE de ASTER y SPOT-5 para la periferia y el margen de la capa de hielo (es decir, por debajo de la elevación de la línea de equilibrio) al sur de aproximadamente 82.5° N y la fotoclinometría del AVHRR en el interior de la capa de hielo y el extremo norte (Scambos y Haran, 2002).
Los MDT de SPOT-5 se produjeron y distribuyeron como parte del proyecto de estudio estereoscópico de hielo polar: imágenes y topografías de referencia (SPIRIT) de Spot5 (Korona et al., 2009). Las superficies oceánicas se enmascararon con la máscara de clasificación de la tierra de GIMP y se reemplazaron por la altura media de la superficie del mar de CNES CLS11 (Schaeffer et al., 2012).
Nota
Todos los datos de elevación del terreno se registran horizontal y verticalmente en las elevaciones promedio de ICESat para el período de 2003 a 2009, por lo que el DEM tiene una fecha nominal de 2007, aunque se debe tener cuidado al usar el DEM en áreas de cambios rápidos, como los principales glaciares de salida al sur de los 70°0N.
El MDT tiene una resolución de 30 m, aunque la resolución "real" del MDT variará de 40 m en las áreas de cobertura de SPOT-5 (consulta Korona et al., 2009) a 500 m en las áreas de fotoclinometría.
El error de validación de la raíz cuadrada del error cuadrático medio en toda la capa de hielo en relación con ICESat es de +/-10 m, y varía de cerca de +/-1 m en la mayoría de las superficies de hielo a +/-30 m en áreas de gran relieve.
Como condición para usar estos datos, debes citar el uso de este conjunto de datos con la cita proporcionada.
Citas
Citas:
Howat, I.M., A. Negrete, B.E. Smith, 2014, The Greenland Ice
Mapping Project (GIMP) land classification and surface elevation
datasets, The Cryosphere, 8, 1509-1518,
doi:10.5194/tc-8-1509-2014article pdf
Este Modelo Digital de Elevación (MDE) se construyó a partir de una combinación de MDE de ASTER y SPOT-5 para la periferia y el margen de la capa de hielo (es decir, por debajo de la elevación de la línea de equilibrio) al sur de aproximadamente 82.5°N y fotoclinometría de AVHRR en el interior de la capa de hielo y el extremo norte (Scambos y Haran, 2002). Los MDT de SPOT-5 eran…
[null,null,[],[[["\u003cp\u003eThe OSU/GIMP/DEM dataset provides a Digital Elevation Model (DEM) of Greenland, primarily constructed from ASTER, SPOT-5 DEMs, and AVHRR photoclinometry.\u003c/p\u003e\n"],["\u003cp\u003eThe DEM has a resolution of 30 meters and is registered to average ICESat elevations for the 2003-2009 time period.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset covers Greenland's ice sheet, including its periphery, margin, and interior, with varying resolutions based on data source.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset has a nominal date of 2007, although caution is advised in areas of rapid change, such as major outlet glaciers.\u003c/p\u003e\n"],["\u003cp\u003eUsers must cite the dataset using the provided citations when utilizing the data.\u003c/p\u003e\n"]]],[],null,["# Greenland DEM - Greenland Mapping Project (GIMP)\n\nDataset Availability\n: 1999-06-30T00:00:00Z--2002-09-04T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA NSIDC DAAC at CIRES](https://doi.org/10.5067/NV34YUIXLP9W)\n\nTags\n:\n[arctic](/earth-engine/datasets/tags/arctic) [elevation-topography](/earth-engine/datasets/tags/elevation-topography) [gimp](/earth-engine/datasets/tags/gimp) [greenland](/earth-engine/datasets/tags/greenland) [nasa](/earth-engine/datasets/tags/nasa) [polar](/earth-engine/datasets/tags/polar) \n\n#### Description\n\nThis Digital Elevation Model (DEM) is constructed from a combination\nof ASTER and SPOT-5 DEM's for the ice sheet periphery and margin\n(i.e. below the equilbrium line elevation) south of\napproximately 82.5°N and AVHRR photoclinometry in the ice sheet\ninterior and far north (Scambos and Haran, 2002).\n\nSPOT-5 DEM's were produced and distributed as part of the Spot5\nstereoscopic survey of Polar Ice: Reference Images \\& Topographies\n(SPIRIT) project (Korona et al., 2009). Ocean surfaces were masked\nusing the GIMP Land Classification mask and replaced with the\nCNES CLS11 mean sea surface height (Schaeffer et al., 2012).\n\n**Note**\n\n- All land elevation data is horizontally and vertically registered to average ICESat elevations for the 2003-2009 time period, and therefore the DEM has a nominal date of 2007, although care must be taken when using the DEM in areas of rapid change, such as major outlet glaciers south of 70°0N.\n- The DEM has a resolution of 30 m, although the \"true\" resolution of the DEM will vary from 40 m in areas of SPOT-5 coverage (see Korona et al. 2009) to 500 m in areas of photoclinometry.\n- The ice-sheet-wide root-mean-squared validation error relative to ICESat is +/-10 m, rangining from close to +/- 1 m over most ice surfaces to +/- 30 m in areas of high relief.\n\n[General documentation](https://doi.org/10.5067/NV34YUIXLP9W)\n\n### Bands\n\n**Bands**\n\n| Name | Units | Pixel Size | Description |\n|-------------|-------|------------|-------------|\n| `elevation` | m | 30 meters | Elevation |\n\n### Terms of Use\n\n**Terms of Use**\n\nAs a condition of using these data, you must cite the use of this\ndata set using the given citation.\n\n### Citations\n\nCitations:\n\n- Howat, I.M., A. Negrete, B.E. Smith, 2014, The Greenland Ice\n Mapping Project (GIMP) land classification and surface elevation\n datasets, The Cryosphere, 8, 1509-1518,\n [doi:10.5194/tc-8-1509-2014](https://doi.org/10.5194/tc-8-1509-2014)\n [article pdf](https://www.the-cryosphere.net/8/1509/2014/tc-8-1509-2014.pdf)\n\n### DOIs\n\n- \u003chttps://doi.org/10.5067/NV34YUIXLP9W\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.Image('OSU/GIMP/DEM');\nvar elevation = dataset.select('elevation');\nvar elevationVis = {\n min: 0.0,\n max: 2000.0,\n};\nMap.setCenter(-41.0, 76.0, 4);\nMap.addLayer(elevation, elevationVis, 'Elevation');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/OSU/OSU_GIMP_DEM) \n[Greenland DEM - Greenland Mapping Project (GIMP)](/earth-engine/datasets/catalog/OSU_GIMP_DEM) \nThis Digital Elevation Model (DEM) is constructed from a combination of ASTER and SPOT-5 DEM's for the ice sheet periphery and margin (i.e. below the equilbrium line elevation) south of approximately 82.5°N and AVHRR photoclinometry in the ice sheet interior and far north (Scambos and Haran, 2002). SPOT-5 DEM's were ... \nOSU/GIMP/DEM, arctic,elevation-topography,gimp,greenland,nasa,polar \n1999-06-30T00:00:00Z/2002-09-04T00:00:00Z \n58.795926930232035 -89.32179714240877 83.95392768557056 7.556480769227746 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/NV34YUIXLP9W](https://doi.org/https://doi.org/10.5067/NV34YUIXLP9W)\n- [https://doi.org/10.5067/NV34YUIXLP9W](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/OSU_GIMP_DEM)"]]
