Swift 地理引擎 GEOSwift

GEOSwift 是 Swift 写的地理引擎，可以轻松处理地理对象模型（点，线串，多边形等）和相关的地形操作（交集，重叠等）。

示例代码

// 1. From Well Known Text (WKT) representation
let point = Waypoint(WKT: "POINT(10 45)")
let polygon = Geometry.create("POLYGON((35 10, 45 45.5, 15 40, 10 20, 35 10),(20 30, 35 35, 30 20, 20 30))")

// 2. From a Well Known Binary (WKB)
let WKB: NSData = geometryWKB()
let geometry2 = Geometry.create(WKB.bytes, size: WKB.length)

// 3. From a GeoJSON file:
if let geoJSONURL = NSBundle.mainBundle().URLForResource("italy", withExtension: "geojson"),
    let geometries = Geometry.fromGeoJSON(geoJSONURL),
    let italy = geometries[0] as? MultiPolygon
{
    italy
}