The MYD10A1 V6 Snow Cover Daily Global 500m product contains snow cover, snow albedo, fractional snow cover, and quality assessment (QA) data. Snow cover data are based on a snow mapping algorithm that employs a Normalized Difference Snow Index (NDSI) and other criteria tests.
MYD10A1 V6 Snow Cover Daily Global 500m产品包含雪盖、雪反照率、雪盖分率和质量评估（QA）数据。积雪覆盖数据是基于采用归一化差异积雪指数（NDSI）和其他标准测试的积雪制图算法。
Dataset Availability
2002-07-04T00:00:00 - 2021-09-22T00:00:00
Dataset Provider
Collection Snippet
ee.ImageCollection("MODIS/006/MYD10A1")
Resolution
500 meters
Bands Table
| Name | Description | Min | Max | Scale |
| NDSI_Snow_Cover | NDSI snow cover. This value is computed for MOD10_L2 and retrieved when the observation of the day is selected. Provider values above 100 are masked out in this band (they can be found in the "NDSI_Snow_Cover_Class" band). | 0 | 100 | 0 |
| NDSI_Snow_Cover_Basic_QA | A basic estimate of the quality of the algorithm result. This value is computed for MOD10_L2 and retrieved with the corresponding observation of the day. | 0 | ||
| NDSI_Snow_Cover_Basic_QA Bitmask |
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| NDSI_Snow_Cover_Algorithm_Flags_QA | Bit flags indicating screen results and the presence of inland water. These flags are set when MOD10_L2 is generated and retrieved with the corresponding observation of the day. | 0 | ||
| NDSI_Snow_Cover_Algorithm_Flags_QA Bitmask |
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| NDSI | Raw NDSI (i.e. prior to screening). This value is computed for MOD10_L2 and retrieved with the corresponding observation of the day. | 0 | 10000 | 0.0001 |
| Snow_Albedo_Daily_Tile | Snow albedo percentage. Provider values above 100 are masked out in this band (they can be found in the "Snow_Albedo_Daily_Tile_Class" band).' | 1 | 100 | 0 |
| orbit_pnt | Pointer to the orbit number of the swath that was selected as the observation of the day. The pointer references by index the list of orbit numbers written to the ORBITNUMBERARRAY metadata object in ArchiveMetadata.0. | 0 | ||
| granule_pnt | Pointer to the granule (swath) that was mapped into the tile. The pointer references the corresponding value in the GRANULEPOINTERARRAY metadata object written to ArchiveMetadata.0. | 0 | ||
| NDSI_Snow_Cover_Class | Landcover classes from the "NDSI_Snow_Cover" subdataset (provider values less than or equal to 100 are masked out). | 0 | ||
| Snow_Albedo_Daily_Tile_Class | Landcover classes from the "Snow_Albedo_Daily_Tile" subdataset (provider values less than or equal to 100 are masked out). | 0 | ||
Class Table: NDSI_Snow_Cover_Class
| Value | Color | Color Value | Description |
| 200 | # | Missing data | |
| 201 | # | No decision | |
| 211 | # | Night | |
| 237 | # | Inland water | |
| 239 | # | Ocean | |
| 250 | # | Cloud | |
| 254 | # | Detector saturated |
Class Table: Snow_Albedo_Daily_Tile_Class
| Value | Color | Color Value | Description |
| 101 | # | No decision | |
| 111 | # | Night | |
| 125 | # | Land | |
| 137 | # | Inland water | |
| 139 | # | Ocean | |
| 150 | # | Cloud | |
| 151 | # | Cloud detected as snow | |
| 250 | # | Missing | |
| 251 | # | Self-shadowing | |
| 252 | # | Land mask mismatch | |
| 253 | # | BRDF failure | |
| 254 | # | Non-production mask |
使用说明：
You may download and use photographs, imagery, or text from the NSIDC web site, unless limitations for its use are specifically stated. For more information on usage and citing NSIDC datasets, please visit the NSIDC 'Use and Copyright' page
引用：Hall, D. K., V. V. Salomonson, and G. A. Riggs. 2016. MODIS/Terra Snow Cover Daily L3 Global 500m Grid. Version 6. Boulder, Colorado USA: NASA National Snow and Ice Data Center Distributed Active Archive Center.
MODIS/Aqua Snow Cover Daily L3 Global 500m SIN Grid, Version 6 | National Snow and Ice Data Center
代码：
var dataset = ee.ImageCollection('MODIS/006/MYD10A1') .filter(ee.Filter.date('2018-01-01', '2018-05-01')); var snowCover = dataset.select('NDSI_Snow_Cover'); var snowCoverVis = { min: 0.0, max: 100.0, palette: ['black', '0dffff', '0524ff', 'ffffff'], }; Map.setCenter(-38.13, 40, 2); Map.addLayer(snowCover, snowCoverVis, 'Snow Cover');
