topic Coordinates WGS84 self.mapView.visibleAreaEnvelope.center.x in ArcGIS Runtime SDK for iOS Questions

Coordinates WGS84 self.mapView.visibleAreaEnvelope.center.x

MauricioSalazar — Sun, 18 May 2014 23:30:37 GMT

Hi, i am trying to show the wgs84 coordinates at center of:

LongCentro.text = [NSString stringWithFormat:@"Long: %.4f", self.mapView.visibleAreaEnvelope.center.x];

with this obtain in other spatial reference but i try to transform to wgs84,

LatCentro.text = [NSString stringWithFormat:@"Long: %.4f", [mapView visibleAreaEnvelope].center.y spatialReference:WKID_WGS_1984_WEB_MERCATOR];

but is wrong!

Thanks for the answers.

Re: Coordinates WGS84 self.mapView.visibleAreaEnvelope.center.x

DiveshGoyal — Fri, 23 May 2014 15:05:03 GMT

If your map is not in WGS84 spatial reference, you need to project the center point of the map's visible area first.

    AGSGeometryEngine* engine = [AGSGeometryEngine defaultGeometryEngine];     AGSPoint* mapPoint = self.mapView.visibleAreaEnvelope.center;     AGSPoint* wgs84Point = (AGSPoint*)[engine projectGeometry:mapPoint toSpatialReference:[AGSSpatialReference wgs84SpatialReference]]; LongCentro.text = [NSString stringWithFormat:@"Long: %.4f", wgs84Point.x];

Re: Coordinates WGS84 self.mapView.visibleAreaEnvelope.center.x

MauricioSalazar — Mon, 26 May 2014 16:09:11 GMT

Thank you, is exactly that looking for!