GEE APP:加载Landsat TOA数据可视化界面，实现点击提取ndvi值

目录

简介

函数

normalizedDifference(bandNames)

Arguments:

Returns: Image

ui.Label(value, style, targetUrl, imageUrl)

Arguments:

Returns: ui.Label

clear()

Arguments:

Returns: ui.Map

reduce(reducer)

Arguments:

Returns: Image

evaluate(callback)

Arguments:

ui.Button(label, onClick, disabled, style, imageUrl)

Arguments:

Returns: ui.Button

代码

结果

---

简介

GEE APP:加载Landsat TOA数据可视化界面，实现点击提取ndvi值

函数

normalizedDifference(bandNames)

Computes the normalized difference between two bands. If the bands to use are not specified, uses the first two bands. The normalized difference is computed as (first − second) / (first + second). Note that the returned image band name is 'nd', the input image properties are not retained in the output image, and a negative pixel value in either input band will cause the output pixel to be masked. To avoid masking negative input values, use ee.Image.expression() t