NDVI Change Detection

Detect vegetation changes using NDVI differencing between two periods.

Pipeline (1 steps)

Detect vegetation changes using NDVI differencing between two periods.

Datasets

sentinel2-l2a

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 Area statistics

Open Code Editor ↗

ndvi-change.js · 8 lines

// NDVI Change Detection
var before = ee.ImageCollection('COPERNICUS/S2_SR_HARMONIZED')
  .filterDate('2019-01-01','2019-12-31').filterBounds(aoi).median();
var after = ee.ImageCollection('COPERNICUS/S2_SR_HARMONIZED')
  .filterDate(startDate, endDate).filterBounds(aoi).median();
var ndviBefore = before.normalizedDifference(['B8','B4']);
var ndviAfter = after.normalizedDifference(['B8','B4']);
var result = ndviAfter.subtract(ndviBefore).rename('NDVI_Change').clip(aoi);

ndvi-change.py · 9 lines

# NDVI Change Detection
import ee
before = (ee.ImageCollection('COPERNICUS/S2_SR_HARMONIZED')
  .filterDate('2019-01-01','2019-12-31').filterBounds(aoi).median())
after = (ee.ImageCollection('COPERNICUS/S2_SR_HARMONIZED')
  .filterDate(start_date, end_date).filterBounds(aoi).median())
ndvi_before = before.normalizedDifference(['B8','B4'])
ndvi_after = after.normalizedDifference(['B8','B4'])
result = ndvi_after.subtract(ndvi_before).rename('NDVI_Change').clip(aoi)

#NDVI#change detection#before-after