MOD44W V6 육지/물 마스크 250m 제품은 MODIS 데이터로 학습되고 MOD44W V5 제품으로 검증된 의사결정 트리 분류기를 사용하여 파생됩니다. 지형 그림자, 화상 흉터, 흐림, 바다의 얼음 덮개로 인해 발생하는 알려진 문제를 해결하기 위해 일련의 마스크가 적용됩니다.
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
품질 보증 (QA)
water_mask_QA의 비트 마스크
비트 0~3: 품질 보증 (QA)
1: 신뢰도가 높은 관측치
2: 신뢰도가 낮은 물이지만 MOD44W V5는 물임
3: 신뢰도가 낮은 토지
4: 해양 마스크
5: 바다 마스크가 있지만 물이 감지되지 않음
6: 불에 탄 지역 (MCD64A1)
7: 도시 또는 불투수성 표면
8: 물이 감지되지 않음, 버전 5 MOD44W에 내륙 물이 표시됨
10: 데이터 없음 (예상 지역 외부)
이용약관
이용약관
LP DAAC를 통해 획득한 MODIS 데이터 및 제품은 후속 사용, 판매 또는 재배포에 제한이 없습니다.
MOD44W V6 육지/물 마스크 250m 제품은 MODIS 데이터로 학습되고 MOD44W V5 제품으로 검증된 의사결정 트리 분류기를 사용하여 파생됩니다. 지형 그림자, 화상 흉터, 흐림, 바다의 얼음 덮개로 인해 발생하는 알려진 문제를 해결하기 위해 일련의 마스크가 적용됩니다.
[null,null,[],[[["\u003cp\u003eThe MOD44W V6 product provides a 250m resolution land/water mask derived from MODIS and SRTM data, distinguishing between land and water.\u003c/p\u003e\n"],["\u003cp\u003eIt utilizes a decision tree classifier and incorporates masks to mitigate issues caused by terrain, burn scars, clouds, and ice.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset spans from 2000-01-01 to 2015-01-01 and is available through NASA LP DAAC at the USGS EROS Center.\u003c/p\u003e\n"],["\u003cp\u003eIt includes a 'water_mask' band indicating land or water and a 'water_mask_QA' band providing quality assurance information.\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"]]],["The MOD44W V6 dataset, provided by NASA LP DAAC, offers a yearly land/water mask product from 2000 to 2015 at a 250-meter resolution, and can be accessed using the Earth Engine snippet. Derived via a decision tree classifier with MODIS data and validated by the V5 product, it uses masks to mitigate issues from terrain shadow, burn scars, cloudiness, or ocean ice. The dataset, available on Google Earth Engine, includes 'water_mask' and 'water_mask_QA' bands.\n"],null,["# MOD44W.006 Terra Land Water Mask Derived From MODIS and SRTM Yearly Global 250m\n\nDataset Availability\n: 2000-01-01T00:00:00Z--2015-01-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/MODIS/MOD44W.006)\n\nCadence\n: 1 Year\n\nTags\n:\n[geophysical](/earth-engine/datasets/tags/geophysical) [mod44w](/earth-engine/datasets/tags/mod44w) [modis](/earth-engine/datasets/tags/modis) [nasa](/earth-engine/datasets/tags/nasa) [srtm](/earth-engine/datasets/tags/srtm) [surface-ground-water](/earth-engine/datasets/tags/surface-ground-water) [usgs](/earth-engine/datasets/tags/usgs) [water-mask](/earth-engine/datasets/tags/water-mask) \n\n#### Description\n\nThe MOD44W V6 land/water mask 250m product is derived using a\ndecision tree classifier trained with MODIS data and validated with the\nMOD44W V5 product. A series of masks are applied to address known issues\ncaused by terrain shadow, burn scars, cloudiness, or ice cover in oceans.\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 | Quality assurance (QA) |\n| Bitmask for water_mask_QA - Bits 0-3: Quality assurance (QA) - 1: High confidence observation - 2: Lower confidence water, but MOD44W V5 is water - 3: Lower confidence land - 4: Ocean mask - 5: Ocean mask, but no water detected - 6: Burned area (MCD64A1) - 7: Urban or impervious surface - 8: No water detected, Version 5 MOD44W shows inland water - 10: No data (outside of projected area) ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\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### DOIs\n\n- \u003chttps://doi.org/10.5067/MODIS/MOD44W.006\u003e\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('MODIS/006/MOD44W')\n .filter(ee.Filter.date('2015-01-01', '2015-05-01'));\nvar waterMask = dataset.select('water_mask');\nvar waterMaskVis = {\n min: 0,\n max: 1,\n palette: ['bcba99', '2d0491'],\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_006_MOD44W) \n[MOD44W.006 Terra Land Water Mask Derived From MODIS and SRTM Yearly Global 250m](/earth-engine/datasets/catalog/MODIS_006_MOD44W) \nThe MOD44W V6 land/water mask 250m product is derived using a decision tree classifier trained with MODIS data and validated with the MOD44W V5 product. A series of masks are applied to address known issues caused by terrain shadow, burn scars, cloudiness, or ice cover in oceans. \nMODIS/006/MOD44W, geophysical,mod44w,modis,nasa,srtm,surface-ground-water,usgs,water-mask \n2000-01-01T00:00:00Z/2015-01-01T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/MODIS/MOD44W.006](https://doi.org/https://doi.org/10.5067/MODIS/MOD44W.006)\n- [https://doi.org/10.5067/MODIS/MOD44W.006](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_006_MOD44W)"]]
