SAR-Based Change Detection

Detect changes using Sentinel-1 SAR backscatter difference.

Pipeline (1 steps)

Detect changes using Sentinel-1 SAR backscatter difference.

Datasets

sentinel1

AOI modes

adminassetdraw

Simulated previewPaste the script in Earth Engine for live results

Outputs the script produces

map Map layers

map Histogram

map Export GeoTIFF

map Change matrix

Open Code Editor ↗

sar-change.js · 8 lines

// SAR Change Detection
var before = ee.ImageCollection('COPERNICUS/S1_GRD')
  .filterDate('2019-01-01','2019-06-30').filterBounds(aoi)
  .filter(ee.Filter.eq('instrumentMode','IW')).select('VV').mean();
var after = ee.ImageCollection('COPERNICUS/S1_GRD')
  .filterDate(startDate, endDate).filterBounds(aoi)
  .filter(ee.Filter.eq('instrumentMode','IW')).select('VV').mean();
var result = after.subtract(before).rename('VV_Change').clip(aoi);

sar-change.py · 9 lines

# SAR Change Detection
import ee
before = (ee.ImageCollection('COPERNICUS/S1_GRD')
  .filterDate('2019-01-01','2019-06-30').filterBounds(aoi)
  .filter(ee.Filter.eq('instrumentMode','IW')).select('VV').mean())
after = (ee.ImageCollection('COPERNICUS/S1_GRD')
  .filterDate(start_date, end_date).filterBounds(aoi)
  .filter(ee.Filter.eq('instrumentMode','IW')).select('VV').mean())
result = after.subtract(before).rename('VV_Change').clip(aoi)

#SAR#Sentinel-1#change detection#radar