Google Earth Engine（GEE）——用不同方法计算slope对比案例分析

本文主要是通过算法计算slope和自己按照核函数去计算slope查看两者之间的差异

这里面有几个属性需要了解下：

ee.Kernel.fixed(width, height, weights, x, y, normalize)

创建内核：设定长和宽，权重，x，y上的偏移位置，也就是回归左下角一般默认，将内核值归一化，使其和为1

Creates a Kernel.

Arguments:

width (Integer, default: -1):

The width of the kernel in pixels.

height (Integer, default: -1):

The height of the kernel in pixels.

weights (List):

A 2-D list of [height] x [width] values to use as the weights of the kernel.

x (Integer, default: -1):

The location of the focus, as an offset from the left.

y (Integer, default: -1):

The location of the focus, as an offset from the top.

normalize (Boolean, default: false):

Normalize the kernel values to sum