- (void)mapViewDidLoad:(AGSMapView *)mapView {
AGSEnvelope *envelope = [AGSEnvelope envelopeWithXmin:1566595.54567948
ymin:5176399.625
xmax:1573200.79567948
ymax:5183800.625
spatialReference:mapView.spatialReference];
[self.mapView zoomToEnvelope:envelope animated:YES];
}