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ee.Algorithms.Terrain
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根据地形 DEM 计算坡度、坡向和简单的山体阴影。
需要包含单个高程波段（以米为单位）的图片，或者如果包含多个波段，则需要包含一个名为“elevation”的波段。添加了以度为单位测量的名为“坡度”和“坡向”的输出波段，以及一个名为“山体阴影”的无符号字节输出波段，用于可视化。所有其他波段和元数据均从输入图像复制。局部梯度是使用每个像素的 4 个相邻像素计算的，因此图像边缘附近会出现缺失值。
| 用法 | 返回 |
|---|
ee.Algorithms.Terrain(input) | 图片 |
| 参数 | 类型 | 详细信息 |
|---|
input | 图片 | 高程图片，以米为单位。 |
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最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003eCalculates slope, aspect, and hillshade from a Digital Elevation Model (DEM) image.\u003c/p\u003e\n"],["\u003cp\u003eOutputs derived bands named 'slope' and 'aspect' in degrees, and 'hillshade' for visualization, while retaining other bands and metadata.\u003c/p\u003e\n"],["\u003cp\u003eEmploys a 4-connected neighborhood for gradient computation, leading to potential missing values along image edges.\u003c/p\u003e\n"],["\u003cp\u003eRequires an input image containing either a single elevation band in meters or a multi-band image with an elevation band named 'elevation'.\u003c/p\u003e\n"],["\u003cp\u003eAccessible via the \u003ccode\u003eee.Algorithms.Terrain(input)\u003c/code\u003e function, returning a processed image.\u003c/p\u003e\n"]]],["The function processes an elevation image (in meters) to compute and add three new bands: 'slope' (degrees), 'aspect' (degrees), and 'hillshade' (unsigned byte). It calculates the local gradient using the four directly connected neighboring pixels. Missing values will occur around image edges due to the four-connected neighbor method. The input image's other bands and metadata are preserved. The function takes an elevation image as input and returns a processed image.\n"],null,["# ee.Algorithms.Terrain\n\nCalculates slope, aspect, and a simple hillshade from a terrain DEM.\n\n\u003cbr /\u003e\n\nExpects an image containing either a single band of elevation, measured in meters, or if there's more than one band, one named 'elevation'. Adds output bands named 'slope' and 'aspect' measured in degrees plus an unsigned byte output band named 'hillshade' for visualization. All other bands and metadata are copied from the input image. The local gradient is computed using the 4-connected neighbors of each pixel, so missing values will occur around the edges of an image.\n\n| Usage | Returns |\n|--------------------------------|---------|\n| `ee.Algorithms.Terrain(input)` | Image |\n\n| Argument | Type | Details |\n|----------|-------|--------------------------------|\n| `input` | Image | An elevation image, in meters. |"]]
