تم إنشاء مجموعة بيانات رطوبة Tasseled Cap (TCW) هذه التي تتضمّن بيانات ناقصة من خلال تطبيق معادلات Tasseled Cap المحدّدة في Lobser وCohen (2007) على صور MODIS المعدّلة وفقًا لوظيفة توزيع الانعكاس الثنائي الاتجاه (BRDF) (MCD43B4). تم ملء الفجوات في البيانات الناتجة باستخدام الطريقة الموضّحة في Weiss et al. (2014) للتخلّص من البيانات الناقصة الناتجة عن عوامل مثل الغطاء السحابي. بعد ملء الفجوات، تم قص البيانات عند الحدود [-1, 2] لضمان الحصول على قيم صالحة.
بعد ذلك، يتم تجميع النتائج التي تمّت تعبئتها على مدار 8 أيام والتي تبلغ مساحتها كيلومترًا واحدًا تقريبًا بشكل مؤقت لإنتاج منتجات شهرية وسنوية.
Weiss, D.J., P.M. Atkinson, S. Bhatt, B. Mappin, S.I. Hay & P.W. Gething
(2014) An effective approach for gap-filling continental scale remotely
sensed time-series. ISPRS Journal of Photogrammetry and Remote Sensing,
98, 106-118.
doi:10.1016/j.isprsjprs.2014.10.001
Lobser, S.E. & Cohen, W.B. (2007) MODIS tasselled cap: land cover
characteristics expressed through transformed MODIS data. International
Journal of Remote Sensing, 28, 5079-5101.
تم إنشاء مجموعة بيانات "رطوبة الغطاء النباتي" (TCW) هذه التي تم ملء الفجوات فيها من خلال تطبيق معادلات "غطاء النبات" المحدّدة في Lobser وCohen (2007) على صور MODIS المعدّلة وفقًا لوظيفة التوزيع الثنائي الاتجاه للانعكاس (BRDF) (MCD43B4). تم ملء الفجوات في البيانات الناتجة باستخدام الطريقة الموضّحة في Weiss et al. (2014) لإزالة البيانات الناقصة الناتجة عن عوامل مثل الغطاء السحابي. …
[null,null,[],[],[],null,["info\n\n\nThis dataset is part of a Publisher Catalog, and not managed by Google Earth Engine.\n\nContact [The Malaria Atlas Project](/earth-engine/datasets/catalog/data.malariaatlas.org@thekids.org.au)\n\nfor bugs or [view more datasets](https://developers.google.com/earth-engine/datasets/publisher/malariaatlasproject)\nfrom the The Malaria Atlas Project Catalog. [Learn more about Publisher datasets](/earth-engine/datasets/publisher). \n[](https://data.malariaatlas.org) \n\nCatalog Owner\n: The Malaria Atlas Project\n\nDataset Availability\n: 2001-02-01T00:00:00Z--2024-01-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [The Malaria Atlas Project](https://www.malariaatlas.org)\n\nContact\n: [The Malaria Atlas Project](/earth-engine/datasets/catalog/data.malariaatlas.org@thekids.org.au)\n\nCadence\n: 1 Year\n\nTags\n:\n[malariaatlasproject](/earth-engine/datasets/tags/malariaatlasproject) [map](/earth-engine/datasets/tags/map) [publisher-dataset](/earth-engine/datasets/tags/publisher-dataset) [tasseled-cap](/earth-engine/datasets/tags/tasseled-cap) [tcw](/earth-engine/datasets/tags/tcw) [vegetation](/earth-engine/datasets/tags/vegetation) [vegetation-indices](/earth-engine/datasets/tags/vegetation-indices) \n\nDescription \nThis gap-filled Tasseled Cap Wetness (TCW) dataset was created by applying\nthe tasseled-cap equations defined in Lobser and Cohen (2007) to\nMODIS BRDF-corrected imagery (MCD43B4). The resulting data were\ngap-filled using the approach outlined in Weiss et al. (2014) to eliminate\nmissing data caused by factors such as cloud cover. After gap-filling the data was clipped to thresholds of \\[-1, 2\\] to ensure valid values.\n\nThe gap-filled 8-daily \\~1km outputs are then aggregated temporally to produce monthly and annual products.\n\nBands\n\n\n**Pixel Size**\n\n5000 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|--------|---------|--------|------------|-------------------------------------------------------------------|\n| `Mean` | -0.84\\* | 0.96\\* | meters | The mean value of Tasseled Cap Wetness for each aggregated pixel. |\n\n\\* estimated min or max value\n\nTerms of Use\n\n**Terms of Use**\n\n[CC-BY-NC-SA-4.0](https://spdx.org/licenses/CC-BY-NC-SA-4.0.html)\n\nCitations \nCitations:\n\n- Weiss, D.J., P.M. Atkinson, S. Bhatt, B. Mappin, S.I. Hay \\& P.W. Gething\n (2014) An effective approach for gap-filling continental scale remotely\n sensed time-series. ISPRS Journal of Photogrammetry and Remote Sensing,\n 98, 106-118.\n [doi:10.1016/j.isprsjprs.2014.10.001](https://doi.org/10.1016/j.isprsjprs.2014.10.001)\n- Lobser, S.E. \\& Cohen, W.B. (2007) MODIS tasselled cap: land cover\n characteristics expressed through transformed MODIS data. International\n Journal of Remote Sensing, 28, 5079-5101.\n\nExplore with Earth Engine **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\nCode Editor (JavaScript) \n\n```javascript\nvar dataset = ee.ImageCollection('projects/malariaatlasproject/assets/TCW_v061/1km/Annual')\n .filter(ee.Filter.date('2018-01-01', '2023-01-01'));\nvar means = dataset.select('Mean');\nvar visParams = {\n min: -0.6,\n max: 0.5,\n palette: ['ffffff','fcd163','99b718','66a000','3e8601','207401','056201','004c00','011301'],\n};\nMap.setCenter(0, 0, 2);\nMap.addLayer(means, visParams, 'Annual TCW: Malaria Atlas Project Gap-Filled Tasseled Cap Wetness');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/malariaatlasproject/projects_malariaatlasproject_assets_TCW_v061_1km_Annual) \n[TCW: Malaria Atlas Project Gap-Filled Tasseled Cap Wetness (Annual 1km)](/earth-engine/datasets/catalog/projects_malariaatlasproject_assets_TCW_v061_1km_Annual) \nThis gap-filled Tasseled Cap Wetness (TCW) dataset was created by applying the tasseled-cap equations defined in Lobser and Cohen (2007) to MODIS BRDF-corrected imagery (MCD43B4). The resulting data were gap-filled using the approach outlined in Weiss et al. (2014) to eliminate missing data caused by factors such as cloud cover. ... \nprojects/malariaatlasproject/assets/TCW_v061/1km/Annual, malariaatlasproject,map,publisher-dataset,tasseled-cap,tcw,vegetation,vegetation-indices \n2001-02-01T00:00:00Z/2024-01-01T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.malariaatlas.org)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/projects_malariaatlasproject_assets_TCW_v061_1km_Annual)"]]
