The Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Emissivity Database (ASTER-GED) was developed by the National Aeronautics and Space Administration's (NASA) Jet Propulsion Laboratory (JPL), California Institute of Technology. This product includes the mean emissivity and standard deviation for all 5 ASTER Thermal Infrared bands, mean land surface temperature (LST) and standard deviation, a re-sampled ASTER GDEM, land-water mask, mean Normalized Difference Vegetation Index (NDVI) and standard deviation, and observation count.
ASTER-GED land surface temperature and emissivity (LST&E) are generated using the ASTER Temperature Emissivity Separation (TES) algorithm in combination with a Water Vapor Scaling (WVS) atmospheric correction method using MODIS MOD07 atmospheric profiles and the MODTRAN 5.2 radiative transfer model.
This product was derived from clear-sky pixels for all available ASTER data (2000-2008).
[User's Guide] (https://lpdaac.usgs.gov/documents/120/ASTERGED_User_Guide_V3.pdf)
高级星载热辐射和反射辐射计全球发射率数据库（ASTER-GED）是由美国国家航空航天局（NASA）加州理工学院喷气推进实验室（JPL）开发。该产品包括所有5个ASTER热红外波段的平均发射率和标准差，平均陆地表面温度（LST）和标准差，重新采样的ASTER GDEM，陆地-水掩码，平均归一化植被指数（NDVI）和标准差，以及观测次数。
ASTER-GED地表温度和发射率（LST&E）是使用ASTER温度发射率分离（TES）算法，结合水汽缩放（WVS）大气校正方法，使用MODIS MOD07大气剖面和MODTRAN 5.2辐射传输模型生成。
这个产品是由所有可用的ASTER数据（2000-2008）的晴空像素得出的。
[用户指南] (https://lpdaac.usgs.gov/documents/120/ASTERGED_User_Guide_V3.pdf)
Dataset Availability
2000-01-01T00:00:00 - 2008-12-31T00:00:00
Dataset Provider
NASA LP DAAC at the USGS EROS Center
Collection Snippet
ee.Image("NASA/ASTER_GED/AG100_003")
Resolution
100 meters
Bands Table
| Name | Description | Min | Max | Units | Scale |
| emissivity_band10 | Mean band 10 | 0 | 1000 | 0.001 | |
| emissivity_band11 | Mean band 11 | 0 | 1000 | 0.001 | |
| emissivity_band12 | Mean band 12 | 0 | 1000 | 0.001 | |
| emissivity_band13 | Mean band 13 | 0 | 1000 | 0.001 | |
| emissivity_band14 | Mean band 14 | 0 | 1000 | 0.001 | |
| emissivity_sdev_band10 | Standard deviation band 10 | -1000 | 1000 | 0.0001 | |
| emissivity_sdev_band11 | Standard deviation band 11 | -1000 | 1000 | 0.0001 | |
| emissivity_sdev_band12 | Standard deviation band 12 | -1000 | 1000 | 0.0001 | |
| emissivity_sdev_band13 | Standard deviation band 13 | -1000 | 1000 | 0.0001 | |
| emissivity_sdev_band14 | Standard deviation band 14 | -1000 | 1000 | 0.0001 | |
| temperature | Temperature mean | 0 | 65535 | K | 0.01 |
| temperature_sdev | Temperature standard deviation | 0 | 65535 | K | 0.01 |
| ndvi | NDVI mean | 0 | 100 | 0.01 | |
| ndvi_sdev | NDVI standard deviation | 0 | 100 | 0.01 | |
| elevation | ASTER Global Digital Elevation Model V002 | -500 | 9000 | Meters | 0 |
| land_water_map | Land water map | 0 | |||
| num_obs | Number of observations | Number per pixel | 0 |
* = Values are estimated
Class Table: land_water_map
| Value | Color | Color Value | Description |
| 1 | #brown | Land | |
| 2 | #blue | Water |
使用说明：
ASTER data and products distributed by the LP DAAC, with the exception of the ASTER Global Digital Elevation Model (GDEM) dataset (ASTGTM) version 2 (v2), have no restrictions on data use, sale, or subsequent redistribution. For more information visit the [ASTER Policies] (LP DAAC - Data Citation and Policies) site.
引用：
Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.https://doi.org/10.5067/COMMUNITY/ASTER_GED/AG100.003
代码：
var dataset = ee.Image('NASA/ASTER_GED/AG100_003'); var elevation = dataset.select('elevation'); var elevationVis = { min: -15.0, max: 5000.0, palette: [ '0602ff', '235cb1', '307ef3', '269db1', '30c8e2', '32d3ef', '3ae237', 'b5e22e', 'd6e21f', 'fff705', 'ffd611', 'ffb613', 'ff8b13', 'ff6e08', 'ff500d', 'ff0000', 'de0101', 'c21301' ], }; Map.setCenter(89.12, 37.72, 3); Map.addLayer(elevation, elevationVis, 'Elevation');
