Model Ketinggian Digital (DEM) ini dibuat dari kombinasi DEM ASTER dan SPOT-5 untuk pinggiran dan batas lapisan es (yaitu di bawah ketinggian garis keseimbangan) di selatan sekitar 82,5°LU dan fotoklinometri AVHRR di interior dan paling utara lapisan es (Scambos dan Haran, 2002).
DEM SPOT-5 diproduksi dan didistribusikan sebagai bagian dari survei stereoskopik Spot5 terhadap Es Kutub: Gambar Referensi & Topografi (SPIRIT) (Korona et al., 2009). Permukaan laut ditutupi
menggunakan mask Klasifikasi Lahan GIMP dan diganti dengan
ketinggian permukaan laut rata-rata CNES CLS11 (Schaeffer et al., 2012).
Catatan
Semua data elevasi daratan didaftarkan secara horizontal dan vertikal
ke elevasi ICESat rata-rata untuk periode 2003-2009, dan
oleh karena itu, DEM memiliki tanggal nominal 2007, meskipun harus
berhati-hati saat menggunakan DEM di area perubahan cepat, seperti
outlet gletser besar di selatan 70°0N.
DEM memiliki resolusi 30 m, meskipun resolusi "sebenarnya" dari
DEM akan bervariasi dari 40 m di area cakupan SPOT-5
(lihat Korona et al. 2009) hingga 500 m di area fotoklinometri.
Error validasi root-mean-squared di seluruh lapisan es relatif terhadap ICESat adalah +/-10 m, yang berkisar dari hampir +/- 1 m di sebagian besar permukaan es hingga +/- 30 m di area dengan relief tinggi.
Sebagai syarat penggunaan data ini, Anda harus mengutip penggunaan set data ini menggunakan kutipan yang diberikan.
Kutipan
Kutipan:
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
Model Ketinggian Digital (DEM) ini dibuat dari kombinasi DEM ASTER dan SPOT-5 untuk pinggiran dan batas lapisan es (yaitu di bawah ketinggian garis keseimbangan) di selatan sekitar 82,5°LU dan fotoklinometri AVHRR di bagian dalam dan paling utara lapisan es (Scambos dan Haran, 2002). DEM SPOT-5 adalah …
[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)"]]
