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