// zoom to SF
AGSEnvelope *env = [AGSEnvelope envelopeWithXmin:-13635831.940381 ymin:4535991.684333 xmax:-13623602.015855 ymax:4553572.200839 spatialReference:[AGSSpatialReference spatialReferenceWithWKID:102113]];
[self.mapView zoomToEnvelope:env animated:YES];