إنّ "فسيفساء صور Landsat في القارة القطبية الجنوبية" (LIMA) هي فسيفساء سلسة وخالية من السحب تقريبًا تم إنشاؤها من مَشاهد Landsat 7 ETM+ المعالَجة.
مجموعة بيانات LIMA هذه هي LIMA الوسيطة ذات 16 بت.
تتألف الفسيفساء من مشاهد معدَّلة ومحسَّنة من حيث الدقة ومطابقة الألوان (النطاقات 1 و2 و3 و4 من جهاز التصوير المحسّن الموضوعي Plus على متن القمر الصناعي Landsat). تم إنشاء الفسيفساء من خلال ترتيب الصور الخالية من السحب في الأعلى واقتصاص حدود الصورة عند حدوث انقطاعات في المربّعات.
هذه الصور متاحة للجميع ويمكن استخدامها بحرية وبدون الحاجة إلى الإشارة إلى مصدرها. ومع ذلك، نقدّر كثيرًا الإشارة إلى مشروع Landsat Image Mosaic of Antarctica (LIMA).
الاقتباسات
الاقتباسات:
Bindschadler, R., Vornberger, P., Fleming, A., Fox, A., Mullins, J.,
Binnie, D., Paulson, S., Granneman, B., and Gorodetzky, D., 2008,
The Landsat Image Mosaic of Antarctica, Remote Sensing of
Environment, 112, pp. 4214-4226.
PDF
إنّ "فسيفساء صور Landsat في القارة القطبية الجنوبية" (LIMA) هي فسيفساء سلسة وخالية من السُحب تقريبًا تم إنشاؤها من مشاهد Landsat 7 ETM+ المعالَجة. مجموعة بيانات LIMA هذه هي LIMA الوسيطة ذات 16 بت. تتألف الفسيفساء من مشاهد انعكاس سطحي معدَّل ومُحسَّن (النطاقات 1 و2 و3 و4 من Landsat ETM+). تم إنشاء الفسيفساء …
[null,null,[],[[["\u003cp\u003eLIMA is a cloud-free mosaic of Antarctica created from Landsat 7 ETM+ scenes, offering a seamless, high-resolution view of the continent.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset provides pan-sharpened, normalized surface reflectance in the blue, green, red, and near-infrared wavelengths with a 15-meter resolution.\u003c/p\u003e\n"],["\u003cp\u003eThe mosaic was created by prioritizing cloud-free images and carefully trimming boundaries to minimize discontinuities.\u003c/p\u003e\n"],["\u003cp\u003eLIMA data is public domain and can be used freely, although attribution to the project is appreciated.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the period from June 30, 1999, to September 4, 2002.\u003c/p\u003e\n"]]],["The Landsat Image Mosaic of Antarctica (LIMA) dataset, provided by USGS, spans from June 30, 1999, to September 4, 2002. It's a cloudless mosaic of processed Landsat 7 ETM+ scenes, using pan-sharpened normalized surface reflectance data. The mosaic was created by layering cloud-free images and adjusting boundaries. Data, available in 15-meter pixel size, is accessible via Earth Engine using the snippet `ee.Image(\"USGS/LIMA/MOSAIC\")`, and users can explore tile footprints at `USGS/LIMA/MOSAIC_TILE_FOOTPRINTS`.\n"],null,["# Landsat Image Mosaic of Antarctica (LIMA) 16-Bit Pan-Sharpened Mosaic\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\nThis LIMA dataset is the 16-bit Intermediate LIMA.\nThe mosaic consists of pan-sharpened normalized surface reflectance\nscenes (Landsat ETM+ bands 1, 2, 3, and 4). The mosaic was\nconstructed by ordering cloud free images on top and trimming\nimage boundaries when tile discontinuities occurred.\n\nUsers can find the mosaic tile footprints available at:\n[USGS/LIMA/MOSAIC_TILE_FOOTPRINTS](https://code.earthengine.google.com/?asset=USGS/LIMA/MOSAIC_TILE_FOOTPRINTS)\n\n### Bands\n\n\n**Pixel Size**\n\n15 meters\n\n**Bands**\n\n| Name | Pixel Size | Wavelength | Description |\n|------|------------|----------------|---------------|\n| `B1` | meters | 0.45 - 0.52 μm | Blue |\n| `B2` | meters | 0.52 - 0.60 μm | Green |\n| `B3` | meters | 0.63 - 0.69 μm | Red |\n| `B4` | meters | 0.77 - 0.90 μm | Near infrared |\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.Image('USGS/LIMA/MOSAIC');\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_MOSAIC) \n[Landsat Image Mosaic of Antarctica (LIMA) 16-Bit Pan-Sharpened Mosaic](/earth-engine/datasets/catalog/USGS_LIMA_MOSAIC) \nThe Landsat Image Mosaic of Antarctica (LIMA) is a seamless and virtually cloudless mosaic created from processed Landsat 7 ETM+ scenes. This LIMA dataset is the 16-bit Intermediate LIMA. The mosaic consists of pan-sharpened normalized surface reflectance scenes (Landsat ETM+ bands 1, 2, 3, and 4). The mosaic was constructed ... \nUSGS/LIMA/MOSAIC, 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_MOSAIC)"]]
