स्मूद किए गए डिजिटल एलिवेशन मॉडल (डीईएम-एस) को, नासा ने फ़रवरी 2000 में SRTM से हासिल किया था. DEM-S, ज़मीन की टोपोग्राफ़ी (वनस्पति की सुविधाओं को छोड़कर) दिखाता है. इसे नॉइज़ कम करने और सतह के आकार को बेहतर तरीके से दिखाने के लिए स्मूथ किया गया है. अनुकूलन की प्रोसेस में, पहाड़ी इलाकों की तुलना में समतल इलाकों में ज़्यादा स्मूदिंग की जाती है. साथ ही, कम शोर वाले इलाकों की तुलना में ज़्यादा शोर वाले इलाकों में ज़्यादा स्मूदिंग की जाती है.
इस DEM-S की मदद से, लोकल टेरेन शेप एट्रिब्यूट का हिसाब लगाया जा सकता है. जैसे, ढलान, पहलू, और घुमाव. ये एट्रिब्यूट, नॉइज़ की वजह से बिना स्मूथ किए गए एक सेकंड के DEM से भरोसेमंद तरीके से नहीं निकाले जा सकते.
कई जगहों पर, अनुमान से कम वैल्यू मिली हैं: कैनबरा के आस-पास (150.443044, -35.355281) में -55 और पश्चिमी ऑस्ट्रेलिया के आस-पास (124.84, -16.44) में -43.
स्मूद डिजिटल एलिवेशन मॉडल (डीईएम-एस), SRTM डेटा से लिया गया है. यह डेटा, नासा ने फ़रवरी 2000 में हासिल किया था. DEM-S, ज़मीन की टोपोग्राफ़ी (वनस्पति की सुविधाओं को छोड़कर) को दिखाता है. इसे स्मूथ किया गया है, ताकि नॉइज़ को कम किया जा सके और सतह के आकार को बेहतर तरीके से दिखाया जा सके. अडैप्टिव प्रोसेस में, कम बदलाव वाले क्षेत्रों में ज़्यादा स्मूदिंग की जाती है. हालांकि, …
[null,null,[],[[["\u003cp\u003eThe DEM-S is a smoothed digital elevation model of Australia derived from SRTM data acquired in February 2000.\u003c/p\u003e\n"],["\u003cp\u003eIt represents ground surface topography, excluding vegetation, and has been smoothed to reduce noise and improve surface shape representation.\u003c/p\u003e\n"],["\u003cp\u003eThe DEM-S has a resolution of 30.92 meters and includes an elevation band, with potential negative values in specific areas.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is available under the CC-BY-4.0 license and is provided by Geoscience Australia.\u003c/p\u003e\n"],["\u003cp\u003eIt is suitable for calculating terrain shape attributes like slope, aspect, and curvature.\u003c/p\u003e\n"]]],[],null,["# DEM-S: Australian Smoothed Digital Elevation Model\n\nDataset Availability\n: 2010-02-01T00:00:00Z--2010-02-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [Geoscience Australia](https://www.ga.gov.au/metadata-gateway/metadata/record/72759/)\n\nTags\n:\n[australia](/earth-engine/datasets/tags/australia) [dem](/earth-engine/datasets/tags/dem) [elevation](/earth-engine/datasets/tags/elevation) [elevation-topography](/earth-engine/datasets/tags/elevation-topography) [ga](/earth-engine/datasets/tags/ga) [geophysical](/earth-engine/datasets/tags/geophysical) [geoscience-australia](/earth-engine/datasets/tags/geoscience-australia) [smoothed](/earth-engine/datasets/tags/smoothed) [srtm](/earth-engine/datasets/tags/srtm) \n\n#### Description\n\nThe Smoothed Digital Elevation Model (DEM-S) was derived\nfrom the SRTM data acquired by NASA in February 2000. DEM-S represents\nground surface topography (excluding vegetation features) and has\nbeen smoothed to reduce noise and improve the representation of\nsurface shape. An adaptive process applied more smoothing in flatter\nareas than hilly areas, and more smoothing in noisier areas than\nin less noisy areas.\n\nThis DEM-S supports calculation of local terrain shape attributes\nsuch as slope, aspect, and curvature that could not be reliably\nderived from the unsmoothed 1 second DEM because of noise.\n\nThere are several areas with unexpected negative values: close to\nCanberra around (150.443044, -35.355281) with values of -55 and in Western\nAustralia around (124.84, -16.44) with -43.\n\n### Bands\n\n\n**Pixel Size**\n\n30.92 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|-------------|-------|----------|-----------|------------|-------------|\n| `elevation` | m | -73.31\\* | 2224.32\\* | meters | Elevation |\n\n\\* estimated min or max value\n\n### Terms of Use\n\n**Terms of Use**\n\n[CC-BY-4.0](https://spdx.org/licenses/CC-BY-4.0.html)\n\n### Citations\n\nCitations:\n\n- Geoscience Australia, 2015. Digital Elevation Model (DEM) of Australia\n derived from LiDAR 5 Metre Grid. Geoscience Australia, Canberra.\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('AU/GA/DEM_1SEC/v10/DEM-S');\nvar elevation = dataset.select('elevation');\nvar elevationVis = {\n min: -10.0,\n max: 1300.0,\n palette: [\n '3ae237', 'b5e22e', 'd6e21f', 'fff705', 'ffd611', 'ffb613', 'ff8b13',\n 'ff6e08', 'ff500d', 'ff0000', 'de0101', 'c21301', '0602ff', '235cb1',\n '307ef3', '269db1', '30c8e2', '32d3ef', '3be285', '3ff38f', '86e26f'\n ],\n};\nMap.setCenter(133.95, -24.69, 5);\nMap.addLayer(elevation, elevationVis, 'Elevation');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/AU/AU_GA_DEM_1SEC_v10_DEM-S) \n[DEM-S: Australian Smoothed Digital Elevation Model](/earth-engine/datasets/catalog/AU_GA_DEM_1SEC_v10_DEM-S) \nThe Smoothed Digital Elevation Model (DEM-S) was derived from the SRTM data acquired by NASA in February 2000. DEM-S represents ground surface topography (excluding vegetation features) and has been smoothed to reduce noise and improve the representation of surface shape. An adaptive process applied more smoothing in flatter areas than ... \nAU/GA/DEM_1SEC/v10/DEM-S, australia,dem,elevation,elevation-topography,ga,geophysical,geoscience-australia,smoothed,srtm \n2010-02-01T00:00:00Z/2010-02-01T00:00:00Z \n-44.06 112.99 -9.99 154 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.ga.gov.au/metadata-gateway/metadata/record/72759/)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/AU_GA_DEM_1SEC_v10_DEM-S)"]]
