diff --git a/mapper/src/App.js b/mapper/src/App.js
index 769d256..2174ac5 100644
--- a/mapper/src/App.js
+++ b/mapper/src/App.js
@@ -199,9 +199,7 @@ function PolylineWithArrows({ coords, showDirection }) {
     return null;
 }
 
-function Map({end, duration, slider, mapState, setMapState, setSubmenu, showDirection}) {
-	const [data, loading] = useSensor('owntracks', 'OwnTracks', end, duration);
-
+function Map({data, loading, end, duration, slider, mapState, setMapState, setSubmenu, showDirection, setDrawnItems}) {
 	const range = useMemo(() => parseSlider(end, duration, slider), [end, duration, slider]);
 
 	const coords = useMemo(() => {
@@ -246,14 +244,25 @@ function Map({end, duration, slider, mapState, setMapState, setSubmenu, showDire
 		localStorage.setItem('api_key', api_key);
 	}
 
-	const onRectangleDrawn = (e) => {
+	const onCreated = (e) => {
 		const { layer } = e;
-		const bounds = layer.getBounds();
-		console.log('Rectangle drawn. Bounds:', {
-			northEast: bounds.getNorthEast(),
-			southWest: bounds.getSouthWest(),
+		setDrawnItems(items => [...items, {id: layer._leaflet_id, bounds: layer.getBounds()}]);
+	};
+
+	const onEdited = (e) => {
+		const { layers } = e;
+		layers.eachLayer(layer => {
+			setDrawnItems(items => items.map(item =>
+				item.id === layer._leaflet_id ? { ...item, bounds: layer.getBounds() } : item
+			));
 		});
-		// In the future, we can use these bounds to filter data or perform a search.
+	};
+
+	const onDeleted = (e) => {
+		const { layers } = e;
+		const deletedIds = [];
+		layers.eachLayer(layer => deletedIds.push(layer._leaflet_id));
+		setDrawnItems(items => items.filter(item => !deletedIds.includes(item.id)));
 	};
 
 	return (
@@ -273,7 +282,9 @@ function Map({end, duration, slider, mapState, setMapState, setSubmenu, showDire
 							<FeatureGroup>
 								<EditControl
 									position="topright"
-									onCreated={onRectangleDrawn}
+									onCreated={onCreated}
+									onEdited={onEdited}
+									onDeleted={onDeleted}
 									draw={{
 										rectangle: true,
 										polyline: false,
@@ -300,7 +311,7 @@ function Map({end, duration, slider, mapState, setMapState, setSubmenu, showDire
 	);
 }
 
-function Menu({duration, setDuration, end, setEnd, slider, setSlider, submenu, setSubmenu, showDirection, setShowDirection, setMapState, shareStart, shareEnd}) {
+function Menu({data, duration, setDuration, end, setEnd, slider, setSlider, submenu, setSubmenu, showDirection, setShowDirection, setMapState, shareStart, shareEnd, drawnItems}) {
 	const [showRange, setShowRange] = useState(false);
 
 	const chooseDuration = (x) => {
@@ -361,6 +372,80 @@ function Menu({duration, setDuration, end, setEnd, slider, setSlider, submenu, s
 		setSubmenu(false);
 	};
 
+	const excludeArea = () => {
+		const drawnRectangles = drawnItems.map(item => item.bounds);
+		if (!drawnRectangles.length || !data || !Array.isArray(data)) {
+			if (!drawnRectangles.length) alert("Please draw one or more rectangles on the map first.");
+			setSubmenu(false);
+			return;
+		}
+
+		const isInsideExclusionZone = (lat, lon) => {
+			for (const rect of drawnRectangles) {
+				if (rect.contains([lat, lon])) {
+					return true;
+				}
+			}
+			return false;
+		};
+
+		const goodSegments = [];
+		let currentSegment = null;
+
+		for (const point of data) {
+			if (!point || typeof point.lat !== 'number' || typeof point.lon !== 'number' || !point.time) {
+				continue;
+			}
+
+			const isInside = isInsideExclusionZone(point.lat, point.lon);
+
+			if (!isInside) {
+				if (!currentSegment) {
+					currentSegment = { start: point.time, end: point.time };
+				} else {
+					currentSegment.end = point.time;
+				}
+			} else {
+				if (currentSegment) {
+					goodSegments.push(currentSegment);
+					currentSegment = null;
+				}
+			}
+		}
+
+		if (currentSegment) {
+			goodSegments.push(currentSegment);
+		}
+
+		if (!goodSegments.length) {
+			alert("No time ranges found outside the selected area(s).");
+			setSubmenu(false);
+			return;
+		}
+
+		let longestSegment = goodSegments[0];
+		for (let i = 1; i < goodSegments.length; i++) {
+			const durationCurrent = moment(longestSegment.end).diff(moment(longestSegment.start));
+			const durationNew = moment(goodSegments[i].end).diff(moment(goodSegments[i].start));
+			if (durationNew > durationCurrent) {
+				longestSegment = goodSegments[i];
+			}
+		}
+
+		const startUnix = moment(longestSegment.start).unix();
+		const endUnix = moment(longestSegment.end).unix();
+		const endOfWindowUnix = end.unix();
+
+		const newSliderStart = Math.round((startUnix - endOfWindowUnix) / duration.secs + duration.num);
+		const newSliderEnd = Math.round((endUnix - endOfWindowUnix) / duration.secs + duration.num);
+
+		const clampedStart = Math.max(0, newSliderStart);
+		const clampedEnd = Math.min(duration.num, newSliderEnd);
+
+		setSlider([clampedStart, clampedEnd]);
+		setSubmenu(false);
+	};
+
 	const range = parseSlider(end, duration, slider);
 	const startDate = moment(end).subtract(...duration.delta);
 
@@ -530,6 +615,7 @@ function Menu({duration, setDuration, end, setEnd, slider, setSlider, submenu, s
 								Show direction
 							</label>
 							<button onClick={recentreView}>Recentre view</button>
+							<button onClick={excludeArea}>Exclude area</button>
 							<button onClick={shareRange}>Share range</button>
 							<button onClick={resetToDefaults}>Reset page</button>
 						</>
@@ -592,6 +678,9 @@ function App() {
 	});
 	const [submenu, setSubmenu] = useState(false);
 	const [showDirection, setShowDirection] = useState(initialShowDirection);
+	const [drawnItems, setDrawnItems] = useState([]);
+
+	const [data, loading] = useSensor('owntracks', 'OwnTracks', end, duration);
 
 	const shareStart = shareStartParam ? moment.unix(shareStartParam) : null;
 	const shareEnd = shareEndParam ? moment.unix(shareEndParam) : null;
@@ -644,6 +733,8 @@ function App() {
 				setMapState={setMapState}
 				shareStart={shareStart}
 				shareEnd={shareEnd}
+				data={data}
+				drawnItems={drawnItems}
 			/>
 
 			<Map
@@ -654,6 +745,9 @@ function App() {
 				setMapState={setMapState}
 				setSubmenu={setSubmenu}
 				showDirection={showDirection}
+				data={data}
+				loading={loading}
+				setDrawnItems={setDrawnItems}
 			/>
 		</div>
 	);