Mosaik Gambar Landsat Antartika (LIMA) adalah mosaik yang mulus
dan hampir tanpa awan yang dibuat dari pemrosesan
adegan Landsat 7 ETM+.
Adegan Landsat yang Diproses (16 bit) adalah adegan NLAPS Level 1Gt yang dikonversi menjadi 16 bit, diproses dengan koreksi sudut matahari, dan dikonversi menjadi nilai reflektansi (Bindschadler 2008).
Setiap gambar Landsat diproses dengan data elevasi dan koreksi sudut matahari untuk memastikan fitur permukaan ditampilkan secara akurat. Sudut matahari di Antartika memberikan kesan matahari terbenam. Karena sudut matahari yang rendah, saat Landsat melintasi Antartika, tepi luar benua tampak lebih terang daripada area yang lebih dekat ke Kutub Selatan, sehingga pemandangan memiliki area terang dan gelap.
Sudut matahari dan bayangan yang tidak konsisten diperbaiki untuk adegan ini. Tanpa proses ini, mosaik akan menghasilkan
gabungan adegan karena setiap adegan akan memiliki sisi yang lebih terang
dan sisi yang lebih gelap.
Pengguna dapat menemukan metadata gambar individual yang tersedia sebagai tabel di:
USGS/LIMA/SR_METADATA
Band
Band
Nama
Ukuran Piksel
Panjang gelombang
Deskripsi
B1
30 meter
0,45 - 0,52 μm
Biru
B2
30 meter
0,52 - 0,60 μm
Hijau
B3
30 meter
0,63 - 0,69 μm
Merah
B4
30 meter
0,77 - 0,90 μm
Inframerah dekat
B5
30 meter
1,55 - 1,75 μm
Inframerah gelombang pendek 1
B7
30 meter
2,08 - 2,35 μm
Inframerah gelombang pendek 2
B8
15 meter
0,52 - 0,90 μm
Panchromatic
Persyaratan Penggunaan
Persyaratan Penggunaan
Gambar-gambar ini berada dalam domain publik dan dapat digunakan secara bebas
dan tanpa atribusi. Namun, kami sangat mengapresiasi jika Anda memberikan atribusi kepada Project Landsat Image Mosaic of Antarctica (LIMA).
Kutipan
Kutipan:
Bindschadler, R., Vornberger, P., Fleming, A., Fox, A., Mullins, J.,
Binnie, D., Paulson, S., Granneman, B., dan Gorodetzky, D., 2008,
The Landsat Image Mosaic of Antarctica, Remote Sensing of
Environment, 112, hlm. 4214-4226.
PDF
Mosaik Gambar Landsat Antartika (LIMA) adalah mosaik yang mulus dan hampir bebas awan yang dibuat dari pemrosesan scene Landsat 7 ETM+. Adegan Landsat yang Diproses (16 bit) adalah adegan NLAPS Level 1Gt yang dikonversi menjadi 16 bit, diproses dengan koreksi sudut matahari, dan dikonversi menjadi nilai reflektansi (Bindschadler 2008). Setiap gambar Landsat adalah …
[null,null,[],[[["\u003cp\u003eLIMA provides a seamless, nearly cloud-free mosaic of Antarctica derived from Landsat 7 ETM+ scenes between 1999 and 2002.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes surface reflectance values, with sun-angle correction applied for consistent illumination across the mosaic.\u003c/p\u003e\n"],["\u003cp\u003eIt offers various spectral bands, including Blue, Green, Red, Near Infrared, and Shortwave Infrared, at 30-meter resolution (15-meter for Panchromatic).\u003c/p\u003e\n"],["\u003cp\u003eLIMA data is publicly available and can be used freely with attribution encouraged.\u003c/p\u003e\n"],["\u003cp\u003eThe USGS provides individual scene metadata as a separate table for more detailed information.\u003c/p\u003e\n"]]],["The Landsat Image Mosaic of Antarctica (LIMA), provided by USGS, is a cloudless mosaic from processed Landsat 7 ETM+ scenes between 1999 and 2002. These scenes underwent sun-angle correction and conversion to reflectance values. Data is available in various bands, including Blue, Green, Red, and Near Infrared, with pixel sizes of 15-30 meters. Individual image metadata is available. These public domain images are freely usable, accessible via Google Earth Engine.\n"],null,["# Landsat Image Mosaic of Antarctica (LIMA) - Processed Landsat Scenes (16 bit)\n\nDataset Availability\n: 1999-06-30T00:00:00Z--2002-09-04T00:00:00Z\n\nDataset Provider\n:\n\n\n [USGS](https://lima.usgs.gov/index.php)\n\nTags\n:\n[antarctica](/earth-engine/datasets/tags/antarctica) [ice](/earth-engine/datasets/tags/ice) [landsat-derived](/earth-engine/datasets/tags/landsat-derived) [lima](/earth-engine/datasets/tags/lima) [mosaic](/earth-engine/datasets/tags/mosaic) [satellite-imagery](/earth-engine/datasets/tags/satellite-imagery) [sr](/earth-engine/datasets/tags/sr) [usgs](/earth-engine/datasets/tags/usgs) \n\n#### Description\n\nThe Landsat Image Mosaic of Antarctica (LIMA) is a seamless\nand virtually cloudless mosaic created from processed\nLandsat 7 ETM+ scenes.\n\nProcessed Landsat Scenes (16 bit) are Level 1Gt NLAPS\nscenes converted to 16 bit, processed with sun-angle\ncorrection, and converted to reflectance values\n([Bindschadler 2008](https://lima.usgs.gov/LIMA_paper.pdf)).\n\nEach Landsat scene is processed with elevation\ndata and sun-angle correction to ensure surface features\nwere accurately represented. The sun's angle in Antarctica\ngives the appearance of a setting sun. Because of the low\nsun angle, as Landsat passes over Antarctica, the outer\nedges of the continent appear brighter than areas closer\nto the South Pole, so scenes have bright and dark areas.\nInconsistent sun angles and shadows where corrected for\nthese scenes. Without this process, mosaicking would produce\na patchwork of scenes since each scene would have a brighter\nand a darker side.\n\nUsers can find individual image metadata available as a table at:\n[USGS/LIMA/SR_METADATA](/earth-engine/datasets/catalog/USGS_LIMA_SR_METADATA)\n\n### Bands\n\n**Bands**\n\n| Name | Pixel Size | Wavelength | Description |\n|------|------------|----------------|----------------------|\n| `B1` | 30 meters | 0.45 - 0.52 μm | Blue |\n| `B2` | 30 meters | 0.52 - 0.60 μm | Green |\n| `B3` | 30 meters | 0.63 - 0.69 μm | Red |\n| `B4` | 30 meters | 0.77 - 0.90 μm | Near infrared |\n| `B5` | 30 meters | 1.55 - 1.75 μm | Shortwave infrared 1 |\n| `B7` | 30 meters | 2.08 - 2.35 μm | Shortwave infrared 2 |\n| `B8` | 15 meters | 0.52 - 0.90 μm | Panchromatic |\n\n### Terms of Use\n\n**Terms of Use**\n\nThese images are in the public domain and can be used freely\nand without acknowledgement. However, credit to the Landsat\nImage Mosaic of Antarctica (LIMA) Project is greatly appreciated.\n\n### Citations\n\nCitations:\n\n- Bindschadler, R., Vornberger, P., Fleming, A., Fox, A., Mullins, J.,\n Binnie, D., Paulson, S., Granneman, B., and Gorodetzky, D., 2008,\n The Landsat Image Mosaic of Antarctica, Remote Sensing of\n Environment, 112, pp. 4214-4226.\n [PDF](https://lima.usgs.gov/LIMA_paper.pdf)\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('USGS/LIMA/SR');\nvar antarctica = dataset.select(['B3', 'B2', 'B1']);\nvar antarcticaVis = {\n min: 0.0,\n max: 10000.0,\n};\nMap.setCenter(164.619, -77.99, 7);\nMap.addLayer(antarctica, antarcticaVis, 'Antartica Imagery (RGB)');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/USGS/USGS_LIMA_SR) \n[Landsat Image Mosaic of Antarctica (LIMA) - Processed Landsat Scenes (16 bit)](/earth-engine/datasets/catalog/USGS_LIMA_SR) \nThe Landsat Image Mosaic of Antarctica (LIMA) is a seamless and virtually cloudless mosaic created from processed Landsat 7 ETM+ scenes. Processed Landsat Scenes (16 bit) are Level 1Gt NLAPS scenes converted to 16 bit, processed with sun-angle correction, and converted to reflectance values (Bindschadler 2008). Each Landsat scene is ... \nUSGS/LIMA/SR, antarctica,ice,landsat-derived,lima,mosaic,satellite-imagery,sr,usgs \n1999-06-30T00:00:00Z/2002-09-04T00:00:00Z \n-90 -180 -55 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://lima.usgs.gov/index.php)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/USGS_LIMA_SR)"]]
