Google Earth engine (GEE) - sentinel-1 comprehensively check the difference between automatic landslide monitoring before and after two months (Guatemala as an example)

Last time we used sentinel2 Spectral analysis was carried out , It is calculated by index NDVI, This time to go further , We combine sentinel1 Take a comprehensive look at the differences between the two . One thing to note here is that we can select a point to view , The displacement information of the point you want to select .

(367 Bar message ) Google Earth Engine（GEE）—— use sentinel-2 The normalized vegetation index (NDVI) was obtained one month ago NDVI differences （ Take Guatemala ）_ This star is bright 2021 Cloud computing of blog in Top3 The blog of -CSDN Blog

Code ：

/**
* *  Make different images for change detection .
*  Preprocessing and visualization  Sentinel-1  Radar data and  Sentinel-2  Optical data .
* S1  The processing steps have been performed according to  Eric Bullock  Tutorial modification for ,[email protected], See ：https://www.youtube.com/watch?v=JZbLokRI8as&t=1210s
*/

// ##########################  User input ：################## ######################
// ################################################ ##################################

// 1.  Define the region of interest ：
//  In the bottom map window , Use