How to find ArcGIS iOS AGSPoint xy coordinates with latitude and longitude?











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I am creating a wayfinding app that will display directions based on the device's current location and desired destination. I am trying to add stop points. How would I find the x and y values of the AGSPoint given the latitude and longitude of the location? I found the following code after doing some research, but the compiler tells me that * is not a prefix unary operator



     func findAGSPointXY(longitude:Double, latitude:Double) -> (){
let mercatorX = longitude * 0.017453292519943295 * 6378137.0;
let a = latitude * 0.017453292519943295;
let mercatorY = 3189068.5 * log((1.0 + sin(a))/(1.0 - sin(a)));
AGSPoint *graphicPoint = [AGSPoint pointWithX:mercatorX y:mercatorY spatialReference:[AGSSpatialReference wgs84SpatialReference]];
}









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    I am creating a wayfinding app that will display directions based on the device's current location and desired destination. I am trying to add stop points. How would I find the x and y values of the AGSPoint given the latitude and longitude of the location? I found the following code after doing some research, but the compiler tells me that * is not a prefix unary operator



         func findAGSPointXY(longitude:Double, latitude:Double) -> (){
    let mercatorX = longitude * 0.017453292519943295 * 6378137.0;
    let a = latitude * 0.017453292519943295;
    let mercatorY = 3189068.5 * log((1.0 + sin(a))/(1.0 - sin(a)));
    AGSPoint *graphicPoint = [AGSPoint pointWithX:mercatorX y:mercatorY spatialReference:[AGSSpatialReference wgs84SpatialReference]];
    }









    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I am creating a wayfinding app that will display directions based on the device's current location and desired destination. I am trying to add stop points. How would I find the x and y values of the AGSPoint given the latitude and longitude of the location? I found the following code after doing some research, but the compiler tells me that * is not a prefix unary operator



           func findAGSPointXY(longitude:Double, latitude:Double) -> (){
      let mercatorX = longitude * 0.017453292519943295 * 6378137.0;
      let a = latitude * 0.017453292519943295;
      let mercatorY = 3189068.5 * log((1.0 + sin(a))/(1.0 - sin(a)));
      AGSPoint *graphicPoint = [AGSPoint pointWithX:mercatorX y:mercatorY spatialReference:[AGSSpatialReference wgs84SpatialReference]];
      }









      share|improve this question













      I am creating a wayfinding app that will display directions based on the device's current location and desired destination. I am trying to add stop points. How would I find the x and y values of the AGSPoint given the latitude and longitude of the location? I found the following code after doing some research, but the compiler tells me that * is not a prefix unary operator



           func findAGSPointXY(longitude:Double, latitude:Double) -> (){
      let mercatorX = longitude * 0.017453292519943295 * 6378137.0;
      let a = latitude * 0.017453292519943295;
      let mercatorY = 3189068.5 * log((1.0 + sin(a))/(1.0 - sin(a)));
      AGSPoint *graphicPoint = [AGSPoint pointWithX:mercatorX y:mercatorY spatialReference:[AGSSpatialReference wgs84SpatialReference]];
      }






      ios arcgis






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      asked Nov 7 at 22:28









      angie

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          It looks like you're mixing objective-c and swift, there are objc pointers (*), objc methods call () and swift const (let) in the same snippet. I assume you're using swift.



          The ArcGIS SDK can reproject geometries, you don't have to compute theses values by hand.



          //Create an AGSPoint from your parameters, specifying them as WGS 84.
          let wgsPoint = AGSPoint(x: longitude, y: latitude, spatialReference: AGSSpatialReference.wgs84())

          //Preparing a Geometry Engine
          let geometryEngine = AGSGeometryEngine.defaultGeometryEngine()

          //Get a projected (in web mercator) geometry (points, lines, polygons and whatever inherit AGSGeometry).
          let projGeometry = geometryEngine.projectGeometry(wgsPoint, toSpatialReference: AGSSpatialReference.webMercatorSpatialReference())
          //Cast it back to AGSPoint, might have some optional to manage
          let projPoint = projGeometry as AGSPoint // Might be some optional to manage there

          //Here you can use projPoint.x and projPoint.y





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            1 Answer
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            1 Answer
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            up vote
            0
            down vote













            It looks like you're mixing objective-c and swift, there are objc pointers (*), objc methods call () and swift const (let) in the same snippet. I assume you're using swift.



            The ArcGIS SDK can reproject geometries, you don't have to compute theses values by hand.



            //Create an AGSPoint from your parameters, specifying them as WGS 84.
            let wgsPoint = AGSPoint(x: longitude, y: latitude, spatialReference: AGSSpatialReference.wgs84())

            //Preparing a Geometry Engine
            let geometryEngine = AGSGeometryEngine.defaultGeometryEngine()

            //Get a projected (in web mercator) geometry (points, lines, polygons and whatever inherit AGSGeometry).
            let projGeometry = geometryEngine.projectGeometry(wgsPoint, toSpatialReference: AGSSpatialReference.webMercatorSpatialReference())
            //Cast it back to AGSPoint, might have some optional to manage
            let projPoint = projGeometry as AGSPoint // Might be some optional to manage there

            //Here you can use projPoint.x and projPoint.y





            share|improve this answer

























              up vote
              0
              down vote













              It looks like you're mixing objective-c and swift, there are objc pointers (*), objc methods call () and swift const (let) in the same snippet. I assume you're using swift.



              The ArcGIS SDK can reproject geometries, you don't have to compute theses values by hand.



              //Create an AGSPoint from your parameters, specifying them as WGS 84.
              let wgsPoint = AGSPoint(x: longitude, y: latitude, spatialReference: AGSSpatialReference.wgs84())

              //Preparing a Geometry Engine
              let geometryEngine = AGSGeometryEngine.defaultGeometryEngine()

              //Get a projected (in web mercator) geometry (points, lines, polygons and whatever inherit AGSGeometry).
              let projGeometry = geometryEngine.projectGeometry(wgsPoint, toSpatialReference: AGSSpatialReference.webMercatorSpatialReference())
              //Cast it back to AGSPoint, might have some optional to manage
              let projPoint = projGeometry as AGSPoint // Might be some optional to manage there

              //Here you can use projPoint.x and projPoint.y





              share|improve this answer























                up vote
                0
                down vote










                up vote
                0
                down vote









                It looks like you're mixing objective-c and swift, there are objc pointers (*), objc methods call () and swift const (let) in the same snippet. I assume you're using swift.



                The ArcGIS SDK can reproject geometries, you don't have to compute theses values by hand.



                //Create an AGSPoint from your parameters, specifying them as WGS 84.
                let wgsPoint = AGSPoint(x: longitude, y: latitude, spatialReference: AGSSpatialReference.wgs84())

                //Preparing a Geometry Engine
                let geometryEngine = AGSGeometryEngine.defaultGeometryEngine()

                //Get a projected (in web mercator) geometry (points, lines, polygons and whatever inherit AGSGeometry).
                let projGeometry = geometryEngine.projectGeometry(wgsPoint, toSpatialReference: AGSSpatialReference.webMercatorSpatialReference())
                //Cast it back to AGSPoint, might have some optional to manage
                let projPoint = projGeometry as AGSPoint // Might be some optional to manage there

                //Here you can use projPoint.x and projPoint.y





                share|improve this answer












                It looks like you're mixing objective-c and swift, there are objc pointers (*), objc methods call () and swift const (let) in the same snippet. I assume you're using swift.



                The ArcGIS SDK can reproject geometries, you don't have to compute theses values by hand.



                //Create an AGSPoint from your parameters, specifying them as WGS 84.
                let wgsPoint = AGSPoint(x: longitude, y: latitude, spatialReference: AGSSpatialReference.wgs84())

                //Preparing a Geometry Engine
                let geometryEngine = AGSGeometryEngine.defaultGeometryEngine()

                //Get a projected (in web mercator) geometry (points, lines, polygons and whatever inherit AGSGeometry).
                let projGeometry = geometryEngine.projectGeometry(wgsPoint, toSpatialReference: AGSSpatialReference.webMercatorSpatialReference())
                //Cast it back to AGSPoint, might have some optional to manage
                let projPoint = projGeometry as AGSPoint // Might be some optional to manage there

                //Here you can use projPoint.x and projPoint.y






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                answered Nov 15 at 14:27









                ddc

                765




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