澳大利亚国家潮间带数字高程模型
National Intertidal Digital Elevation Model 25m 1.0.0
国家潮间带数字高程模型（NIDEM；Bishop-Taylor 等人，2018 年、2019 年）是澳大利亚裸露潮间带的大陆尺度高程数据集。NIDEM 首次以 25 米的空间分辨率三维呈现了澳大利亚潮间带的沙滩和海岸、滩涂、岩石海岸和礁石，弥补了潮下测深数据与陆地高程数据之间的关键差距。通过将全球潮汐建模与澳大利亚数字地球（DEA）平台管理的经过空间和光谱校准的陆地卫星卫星数据的 30 年时间序列档案相结合，生成了 NIDEM。NIDEM 是对现有潮间带范围产品的补充，提供的数据可支持需要更详细了解潮间带三维地形的新用途，如流体力学建模、沿海风险管理和生态栖息地制图。
Catalog Owner
Geoscience Australia
Dataset Availability
1986-08-16T00:00:00Z–2017-07-31T23:59:59
Dataset Provider
Contact
Earth Engine Snippet
ee.Image("projects/geoscience-aus-cat/assets/NIDEM")
Resolution
25 meters
Bands
| Name | Units | Min | Max | Description |
|---|---|---|---|---|
nidem |
m | -5 | 3.9 | Primary product: elevation in meter units relative to modelled Mean Sea Level (MSL). |
nidem_mask |
Quality flag. |
|||
nidem_uncertainty |
m | 0 | 0.3 | Uncertainty meters. |
nidem_unfiltered |
m | -5 | 3.9 | Un-cleaned elevation in meters. |
nidem_mask Class Table
| Value | Color | Description |
|---|---|---|
| 1 | #00ff00 | above 25 m relative to Mean Sea Level (MSL) |
| 2 | #ff0000 | below -25 m relative to Mean Sea Level (MSL) |
| 3 | #ffff00 | invalid elevation estimates |
代码：
var nidem = ee.Image('projects/geoscience-aus-cat/assets/NIDEM');
var elevation = nidem.select('nidem');
var elevationVis = {
min: -2.5,
max: 1.5,
palette: [
'440154', '471365', '482475', '463480', '414487', '3b528b', '355f8d',
'2f6c8e', '2a788e', '25848e', '21918c', '1e9c89', '22a884', '2fb47c',
'44bf70', '5ec962', '7ad151', '9bd93c', 'bddf26', 'dfe318', 'fde725'
],
};
Map.setCenter(122.36, -18.10, 11);
Map.addLayer(
elevation, elevationVis,
'National Intertidal Digital Elevation Model (NIDEM; m)');
数据引用：
Bishop-Taylor, R., Sagar, S., Lymburner, L., & Beaman, R. J. (2019). Between the tides: Modelling the elevation of Australia's exposed intertidal zone at continental scale. Estuarine, Coastal and Shelf Science, 223, 115-128.
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