Global Water Mask는 SWBD (SRTM Water Body Data)를 MODIS 250m 데이터와 결합하여 2000~2002년경의 250m 공간 해상도로 완전한 전 세계 표면수 지도를 만듭니다. 이 데이터 세트는 래스터 데이터 처리 및 최종 래스터 데이터 제품에서 물을 마스킹하는 데 사용됩니다.
대역
픽셀 크기 250미터
대역
이름
픽셀 크기
설명
water_mask
미터
육지-물 마스크
water_mask의 비트 마스크
비트 0: 육지-물 마스크
0: 육지
1: 물
water_mask_qa
미터
워터 픽셀을 제공한 데이터 소스를 표시합니다.
water_mask_qa의 비트 마스크
비트 0~3: 육지-물 마스크 HDF 과학 QA
1: SRTM 수역 데이터 세트 (SWBD) 물
2: MODIS 250m water-hits water
3: MODIS 250m 결정 트리 물
4: 디지털화된 물
5: 남극 모자이크 (MOA) 물
10: 디지털화된 토지
이용약관
이용약관
LP DAAC를 통해 획득한 MODIS 데이터 및 제품은 후속 사용, 판매 또는 재배포에 제한이 없습니다.
[null,null,[],[[["\u003cp\u003eThe MODIS/MOD44W/MOD44W_005_2000_02_24 dataset provides a global water mask at 250m resolution, combining data from SRTM and MODIS to identify surface water.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset, covering circa 2000-2002, is primarily used for processing raster data and masking out water in final products.\u003c/p\u003e\n"],["\u003cp\u003eIt includes two bands: \u003ccode\u003ewater_mask\u003c/code\u003e (indicating land or water) and \u003ccode\u003ewater_mask_qa\u003c/code\u003e (specifying the water pixel's source).\u003c/p\u003e\n"],["\u003cp\u003eMODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.\u003c/p\u003e\n"],["\u003cp\u003eUsers can explore and analyze this dataset further using Google Earth Engine.\u003c/p\u003e\n"]]],[],null,["# MOD44W.005 Land Water Mask Derived From MODIS and SRTM\n\nDataset Availability\n: 2000-02-24T00:00:00Z--2000-02-24T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table)\n\nTags\n:\n[geophysical](/earth-engine/datasets/tags/geophysical) [mod44w](/earth-engine/datasets/tags/mod44w) [modis](/earth-engine/datasets/tags/modis) [srtm](/earth-engine/datasets/tags/srtm) [surface-ground-water](/earth-engine/datasets/tags/surface-ground-water) [water-mask](/earth-engine/datasets/tags/water-mask) \n\n#### Description\n\nThe Global Water Mask uses the SWBD (SRTM Water Body\nData) in combination with MODIS 250m data to create a complete\nglobal map of surface water at 250m spatial resolution, circa 2000-2002. This\ndataset is intended for use in processing of raster data and for\nmasking out water in final raster data products.\n\n### Bands\n\n\n**Pixel Size**\n\n250 meters\n\n**Bands**\n\n| Name | Pixel Size | Description |\n|-----------------|------------|---------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `water_mask` | meters | Land-water mask |\n| Bitmask for water_mask - Bit 0: Land-water mask - 0: Land - 1: Water ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `water_mask_qa` | meters | Shows which data source provided the water pixel. |\n| Bitmask for water_mask_qa - Bits 0-3: Land-water mask HDF science QA - 1: SRTM water body dataset (SWBD) water - 2: MODIS 250m water-hits water - 3: MODIS 250m decision-tree water - 4: Digitized water - 5: Mosaic of Antarctica (MOA) water - 10: Digitized land ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n### Terms of Use\n\n**Terms of Use**\n\nMODIS data and products acquired through the LP DAAC\nhave no restrictions on subsequent use, sale, or redistribution.\n\n### Citations\n\nCitations:\n\n- Please visit [LP DAAC 'Citing Our Data' page](https://lpdaac.usgs.gov/citing_our_data)\n for information on citing LP DAAC datasets.\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('MODIS/MOD44W/MOD44W_005_2000_02_24');\nvar waterMask = dataset.select('water_mask');\nvar waterMaskVis = {\n min: 0.0,\n max: 1,\n};\nMap.setCenter(6.746, 46.529, 2);\nMap.addLayer(waterMask, waterMaskVis, 'Water Mask');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_MOD44W_MOD44W_005_2000_02_24) \n[MOD44W.005 Land Water Mask Derived From MODIS and SRTM](/earth-engine/datasets/catalog/MODIS_MOD44W_MOD44W_005_2000_02_24) \nThe Global Water Mask uses the SWBD (SRTM Water Body Data) in combination with MODIS 250m data to create a complete global map of surface water at 250m spatial resolution, circa 2000-2002. This dataset is intended for use in processing of raster data and for masking out water in final ... \nMODIS/MOD44W/MOD44W_005_2000_02_24, geophysical,mod44w,modis,srtm,surface-ground-water,water-mask \n2000-02-24T00:00:00Z/2000-02-24T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_MOD44W_MOD44W_005_2000_02_24)"]]
