스무딩된 디지털 고도 모델 (DEM-S)은 2000년 2월 NASA에서 획득한 SRTM 데이터에서 파생되었습니다. DEM-S는 지표면 지형 (식물 기능 제외)을 나타내며 노이즈를 줄이고 표면 모양의 표현을 개선하기 위해 평활화되었습니다. 적응형 프로세스는 언덕이 많은 지역보다 평평한 지역에 더 많은 스무딩을 적용하고, 소음이 적은 지역보다 소음이 많은 지역에 더 많은 스무딩을 적용했습니다.
이 DEM-S는 노이즈로 인해 평활화되지 않은 1초 DEM에서 안정적으로 파생될 수 없는 경사, 경사면, 곡률과 같은 지역 지형 모양 속성의 계산을 지원합니다.
예상치 못한 음수 값이 있는 영역이 몇 군데 있습니다. 캔버라 근처 (150.443044, -35.355281)에 -55 값이 있고 서부 오스트레일리아 근처 (124.84, -16.44)에 -43 값이 있습니다.
평활화된 디지털 고도 모델 (DEM-S)은 2000년 2월 NASA에서 획득한 SRTM 데이터에서 파생되었습니다. DEM-S는 지표면 지형 (식물 기능 제외)을 나타내며 노이즈를 줄이고 표면 모양의 표현을 개선하기 위해 평활화되었습니다. 적응형 프로세스는 평평한 영역에 …
[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)"]]