百度地图bd09II坐标转换天地图CGCS2000坐标

// 百度坐标系转大地坐标系
export const coordinateTransformation: any = {
	BD09II2WGS84(bdLon: number, bdLat: number) {
		let x_pi = 3.14159265358979324 * 3000.0 / 180.0;
		//百度坐标转成火星坐标
		let mars_point = { lat: 0, lon: 0,};
		let x = bdLon - 0.0065;
		let y = bdLat - 0.006;
		let z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
		let theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
		mars_point.lat = z * Math.sin(theta);
		mars_point.lon = z * Math.cos(theta);

		//把火星坐标GCJ02转地球坐标系WGS84
		let gcjLat =  mars_point.lat;
		let gcjLon = mars_point.lon;
		let d = this.delta(gcjLat, gcjLon)
		return {
			'lat': ( gcjLat - d.lat ),
			'lon': ( gcjLon - d.lon )
		}
	},
	delta(lat: number, lon: number) {
		let PI = 3.14159265358979324;
		let a = 6378245.0 
		let ee = 0.00669342162296594323 
		let dLat = this.transformLat(lon - 105.0, lat - 35.0)
		let dLon = this.transformLon(lon - 105.0, lat - 35.0)
		let radLat = lat / 180.0 * PI
		let magic = Math.sin(radLat)
		magic = 1 - ee * magic * magic
		let sqrtMagic = Math.sqrt(magic)
		dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * PI)
		dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * PI)
		return {
			'lat': dLat,
			'lon': dLon
		}
	},
	transformLat(x: number, y: number) {
		let PI = 3.14159265358979324;
		let ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x))
		ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0
		ret += (20.0 * Math.sin(y * PI) + 40.0 * Math.sin(y / 3.0 * PI)) * 2.0 / 3.0
		ret += (160.0 * Math.sin(y / 12.0 * PI) + 320 * Math.sin(y * PI / 30.0)) * 2.0 / 3.0
		return ret
	},
	transformLon(x: number, y: number) {
		let PI = 3.14159265358979324;
		let ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x))
		ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0
		ret += (20.0 * Math.sin(x * PI) + 40.0 * Math.sin(x / 3.0 * PI)) * 2.0 / 3.0
		ret += (150.0 * Math.sin(x / 12.0 * PI) + 300.0 * Math.sin(x / 30.0 * PI)) * 2.0 / 3.0
		return ret
	}
}