// Define a point of interest. Use the UI Drawing Tools to import a point
// geometry and name it "point" or set the point coordinates with the
// ee.Geometry.Point() function as demonstrated here.
var Boundary = Boundary
// Import the Landsat 8 TOA image collection.
var l8 = ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA');
// Get the least cloudy image.
var image = ee.Image(
l8.filterBounds(Boundary)
.filterDate('2021-01-01', '2025-12-31')
.sort('CLOUD_COVER')
.first()
);
// Compute the Normalized Difference Vegetation Index (NDVI).
var nir = image.select('B5');
var red = image.select('B4');
var ndvi = nir.subtract(red).divide(nir.add(red)).rename('NDVI');
// Display the result.
Map.centerObject(Boundary);
var ndviParams = {min: -1, max: 1, palette: ['blue', 'white', 'green']};
Map.addLayer(ndvi, ndviParams, 'NDVI image');
Map.addLayer(Boundary, {color: 'Red'}, 'RSPB Dove Stone Boundary')
// Legend
var palette = ["white", "green"]
var vis = {min: -1, max: 1, palette: palette};
var nSteps = 15
// Creates a color bar thumbnail image for use in legend from the given color palette
function makeColorBarParams(palette) {
return {
bbox: [0, 0, nSteps, 0.1],
dimensions: '100x10',
format: 'png',
min: 0,
max: nSteps,
palette: palette,
};
}
// Create the colour bar for the legend
var colorBar = ui.Thumbnail({
image: ee.Image.pixelLonLat().select(0).int(),
params: makeColorBarParams(vis.palette),
style: {stretch: 'horizontal', margin: '0px 8px', maxHeight: '24px'},
});
// Create a panel with three numbers for the legend
var legendLabels = ui.Panel({
widgets: [
ui.Label(vis.min, {margin: '4px 8px'}),
ui.Label(
((vis.max-vis.min) / 2+vis.min),
{margin: '4px 8px', textAlign: 'center', stretch: 'horizontal'}),
ui.Label(vis.max, {margin: '4px 8px'})
],
layout: ui.Panel.Layout.flow('horizontal')
});
// Legend title
var legendTitle = ui.Label({
value: 'NDVI',
style: {fontWeight: 'bold'}
});
// Add the legendPanel to the map
var legendPanel = ui.Panel([legendTitle, colorBar, legendLabels]);
Map.add(legendPanel);
//Print
![[DS_NDVI.jpg]]
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