南极洲DEM数据
This dataset is a digital elevation model (DEM) of the Antarctic ice sheet and ice shelves based on observations recorded by the CryoSat-2 satellite radar altimeter between July 2010 and July 2016.
The DEM is formed from spatio-temporal fits to elevation measurements accumulated within 1, 2, and 5 km grid cells, and is posted at the modal resolution of 1 km. The median and root mean square difference between the DEM and 2.3*10⁷ airborne laser altimeter measurements acquired during NASA Operation IceBridge campaigns are -0.30 and 13.50 m, respectively.
The DEM uncertainty rises in regions of high slope, especially where elevation measurements were acquired in low-resolution mode; taking this into account, we estimate the average accuracy to be 9.5 m.
Dataset Availability
2010-07-01T00:00:00 - 2016-07-01T00:00:00
Dataset Provider
Collection Snippet
ee.Image("CPOM/CryoSat2/ANTARCTICA_DEM")
Resolution
1000 meters
Bands Table
| Name | Description | Units |
| elevation | Antarctic ice sheet and ice shelf elevation. | meters |
| data_composition | Data processing method of elevation per grid cell. | |
| slope | Slope derived from elevation gradient. | degrees |
| z_smoothed | Smoothed version of elevation model using a median filter. | meters |
| z_uncertainty | Certainty of elevation model derived from RMS of elevation residuals in observed grid cells and the kriging variance error in interpolated grid cells. | meters |
Class Table: data_composition
| Value | Color | Color Value | Description |
| 0 | #000000 | interpolated | |
| 1 | #CBCBCB | 1 km fit | |
| 2 | #377EB7 | resampled 2 km fit | |
| 3 | #E2191B | resampled 5 km fit |
数据引用：
Slater, T., Shepherd, A., McMillan, M., Muir, A., Gilbert, L., Hogg, A. E., Konrad, H. and Parrinello, T.: A new Digital Elevation Model of Antarctica derived from CryoSat-2 altimetry, The Cryosphere, doi:10.5194/tc-2017-223, 2018
代码：
var dataset = ee.Image('CPOM/CryoSat2/ANTARCTICA_DEM'); var visualization = { bands: ['elevation'], min: 0.0, max: 4000.0, palette: ['001fff', '00ffff', 'fbff00', 'ff0000'] }; Map.setCenter(17.0, -76.0, 3); Map.addLayer(dataset, visualization, 'Elevation');
