如何將衛星地面軌跡繪製成Swift地圖投影

Question

我想繪製mapview中給定軌道中衛星的地面軌跡。我已經擁有包含衛星的x，y，z位置以及經度和緯度數據的數據集。我只在繪圖時遇到問題。

Answer 1

您可以使用MKGeodesicPolyline。更多信息here

//Replace this with whatever you have for a source of locations 
var satellitePathLocations = [ 
    CLLocation(latitude: -73.761105, longitude: 41.017791), 
    CLLocation(latitude: -73.760701, longitude: 41.019348), 
    CLLocation(latitude: -73.757201, longitude: 41.019267), 
    CLLocation(latitude: -73.757482, longitude: 41.016375), 
    CLLocation(latitude: -73.761105, longitude: 41.017791) 
] 


var coordinates = satellitePathLocations.map({(location: CLLocation!) -> CLLocationCoordinate2D in return location.coordinate}) 

let polyline = MKGeodesicPolyline(coordinates: coordinates, count: coordinates.count) 
mapView.add(polyline) 

// On your MKMapView delegate 

func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! { 
    if overlay is MKGeodesicPolyline { 
     var polylineRenderer = MKPolylineRenderer(overlay: overlay) 
     polylineRenderer.strokeColor = UIColor.blueColor() 
     polylineRenderer.lineWidth = 2 
     return polylineRenderer 
    } 

    return nil 
}