implemented restrecting the zoom level by supporting zoom level of satellite imagery.

Author: srikanth-vg

GoInfoGame/GoInfoGame/Helpers/Extensions.swift

@@ -62,6 +62,21 @@ extension MKMapView {
     func isZoomedIn(maxLatitudeDelta: CLLocationDegrees = 0.005) -> Bool {
         return self.region.span.latitudeDelta <= maxLatitudeDelta
     }
+    
+    func distanceForZoom(zoomLevel: Int) -> CLLocationDistance {
+        // Earth's circumference in meters
+        let earthCircumference: Double = 40075016.686
+        // Standard tile size (pixels)
+        let tileSize: Double = 256
+        // Get the width of the map in points and scale by screen
+        let scale = UIScreen.main.scale
+        let mapWidthInPixels = Double(self.frame.size.width) * scale
+        // Calculate meters per pixel at equator for the given zoom
+        let metersPerPixel = earthCircumference / (tileSize * pow(2.0, Double(zoomLevel)))
+        // The distance (in meters) visible in the current map width
+        return metersPerPixel * mapWidthInPixels
+    }
+
 }
 
 extension CLLocationCoordinate2D: CustomPersistable {

GoInfoGame/GoInfoGame/UI/Map/MapView.swift

@@ -265,6 +265,11 @@ struct MapView: View {
                     selected: $viewModel.selectedOption,
                     onSelect: { selected in
                         viewModel.selectedOption = selected
+                        if case .wmts(let wmts) = selected {
+                            mapViewRef?.setCameraZoomRange(MKMapView.CameraZoomRange(minCenterCoordinateDistance: mapViewRef?.distanceForZoom(zoomLevel: wmts.extent.maxZoom) ?? 0.0), animated: true)
+                        } else {
+                            mapViewRef?.setCameraZoomRange(nil, animated: true)
+                        }
                         viewModel.showSatellitePicker = false
                         addOverlay(selectedSatilliteOption: selected)
                     }