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]];
}
ios arcgis
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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]];
}
ios arcgis
add a comment |
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]];
}
ios arcgis
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
ios arcgis
asked Nov 7 at 22:28
angie
11
11
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1 Answer
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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
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
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
add a comment |
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
add a comment |
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
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
answered Nov 15 at 14:27
ddc
765
765
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