polygon

This should be fairly easy but I can't find my way thru. tri_fill <- structure( list(x= c(0.75, 0.75, 2.25, 3.25), y = c(40, 43, 43, 40)), .Names = c("x", "y"), row.names = c(NA, -4L), class = "data.frame",Integrated=NA, Related=NA) # install.packages("ggplot2", dependencies = TRUE) require(ggplot2) ggplot(data=tri_fill,aes(x=x, y=y))+ geom_polygon() + scale_fill_gradient(limits=c(1, 4), low = "lightgrey", high = "red") What I want is a gradient along the x-axis, but with the above I only get a legend with a gradient and the polygon with solid fill. Here is a possible solution for when you

I would like to calculate the are of a polygon drawn in a map fragment for a college project. This is how I draw my polygon. @Override public void onMapClick(LatLng point) { //tvLocInfo.setText("New marker added@" + point.toString()); map.addMarker(new MarkerOptions().position(point).draggable(true).title(point.toString())); markerClicked = false; } @Override public void onMapLongClick(LatLng point) { //tvLocInfo.setText("New marker added@" + point.toString()); map.clear(); } @Override public boolean onMarkerClick(Marker marker) { if(markerClicked){ if(polygon != null){ polygon.remove();

When a user has drawn a polygon in Google Maps using the built in Drawing Manager I save the polygon path. I want to convert this polygon path to an SVG path so that I can reproduce the shape of the polygon drawn easily, without requiring lots of additional map loads and calls to the Google Maps API. I'm sure it's just some fairly trivial mathematics but can't work out how to do it. Do I need to create a bounding box around the points and translate it to LatLng 0, 0 before scaling it down or can I do something simpler using just the LatLng coordinates of each point? I've found lots of

I have an app that find the shortest distance between my user to a polygon. I want to convert the polygon to Geofence to check the distance between the user to the area to give mor accurate information to the user. how can I do that? this is the MapsActivity public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, LocationListener, MinimumDistanceTask.GetMinimumDistanceListener { private GoogleMap mMap; private LocationManager manager; private double lat, lng; private KmlLayer layer; private LatLng latLngTest; private boolean contains = false; private ArrayList<LatLng>

is it possible to create different coloured polygons on a map view using the following method? -(MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id )overlay{ say if i had 2 polygons could i set one to red and the other to yellow? One way is to use the title property to tell one polygon from another. When adding the polygons, set their title accordingly: pone.title = @"one"; [mapView addOverlay:pone]; pother.title = @"other"; [mapView addOverlay:pother]; Then in viewForOverlay , you can set the color based on title: - (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id

In drawing application we can identify when the user is starting to draw and moving the finger to make a line/shape. I'm trying to do the same on a map, how can I do this? Basic steps will involve: 1) Add a overlay view whenever user starts to draw. lazy var canvasView:CanvasView = { var overlayView = CanvasView(frame: self.googleMapView.frame) overlayView.isUserInteractionEnabled = true overlayView.delegate = self return overlayView }() @IBAction func drawActn(_ sender: AnyObject?) { self.coordinates.removeAll() self.view.addSubview(canvasView) let origImage = UIImage(named: "pen") let