// // CLLocation+YCLocation.m // Topevery.GPS 转换 // // Created by wangshuai on 15-5-10. // Copyright (c) 2015年 wangshuai. All rights reserved. // #import "CLLocation+YCLocation.h" void transform_earth_from_mars(double lat, double lng, double* tarLat, double* tarLng); void transform_mars_from_baidu(double lat, double lng, double* tarLat, double* tarLng); void transform_baidu_from_mars(double lat, double lng, double* tarLat, double* tarLng); @implementation CLLocation (YCLocation) - (CLLocation*)locationMarsFromEarth { double lat = 0.0; double lng = 0.0; transform_earth_from_mars(self.coordinate.latitude, self.coordinate.longitude, &lat, &lng); return [[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake(lat+self.coordinate.latitude, lng+self.coordinate.longitude) altitude:self.altitude horizontalAccuracy:self.horizontalAccuracy verticalAccuracy:self.verticalAccuracy course:self.course speed:self.speed timestamp:self.timestamp]; } - (CLLocation*)locationEarthFromMars { double lat = 0.0; double lng = 0.0; transform_earth_from_mars(self.coordinate.latitude, self.coordinate.longitude, &lat, &lng); return [[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake(self.coordinate.latitude-lat, self.coordinate.longitude-lng) altitude:self.altitude horizontalAccuracy:self.horizontalAccuracy verticalAccuracy:self.verticalAccuracy course:self.course speed:self.speed timestamp:self.timestamp]; return nil; } - (CLLocation*)locationBaiduFromMars { double lat = 0.0; double lng = 0.0; transform_mars_from_baidu(self.coordinate.latitude, self.coordinate.longitude, &lat, &lng); return [[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake(lat, lng) altitude:self.altitude horizontalAccuracy:self.horizontalAccuracy verticalAccuracy:self.verticalAccuracy course:self.course speed:self.speed timestamp:self.timestamp]; } - (CLLocation*)locationMarsFromBaidu { double lat = 0.0; double lng = 0.0; transform_baidu_from_mars(self.coordinate.latitude, self.coordinate.longitude, &lat, &lng); return [[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake(lat, lng) altitude:self.altitude horizontalAccuracy:self.horizontalAccuracy verticalAccuracy:self.verticalAccuracy course:self.course speed:self.speed timestamp:self.timestamp]; } -(CLLocation*)locationEarthFromBaidu { double lat = 0.0; double lng = 0.0; CLLocation *Mars = [self locationMarsFromBaidu]; transform_earth_from_mars(Mars.coordinate.latitude, Mars.coordinate.longitude, &lat, &lng); return [[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake(Mars.coordinate.latitude-lat, Mars.coordinate.longitude-lng) altitude:self.altitude horizontalAccuracy:self.horizontalAccuracy verticalAccuracy:self.verticalAccuracy course:self.course speed:self.speed timestamp:self.timestamp]; return nil; } @end // --- transform_earth_from_mars --- // 参考来源：https://on4wp7.codeplex.com/SourceControl/changeset/view/21483#353936 // Krasovsky 1940 // // a = 6378245.0, 1/f = 298.3 // b = a * (1 - f) // ee = (a^2 - b^2) / a^2; const double a = 6378245.0; const double ee = 0.00669342162296594323; bool transform_sino_out_china(double lat, double lon) { if (lon < 72.004 || lon > 137.8347) return true; if (lat < 0.8293 || lat > 55.8271) return true; return false; } double transform_earth_from_mars_lat(double x, double y) { double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * sqrt(fabs(x)); ret += (20.0 * sin(6.0 * x * M_PI) + 20.0 * sin(2.0 * x * M_PI)) * 2.0 / 3.0; ret += (20.0 * sin(y * M_PI) + 40.0 * sin(y / 3.0 * M_PI)) * 2.0 / 3.0; ret += (160.0 * sin(y / 12.0 * M_PI) + 320 * sin(y * M_PI / 30.0)) * 2.0 / 3.0; return ret; } double transform_earth_from_mars_lng(double x, double y) { double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * sqrt(fabs(x)); ret += (20.0 * sin(6.0 * x * M_PI) + 20.0 * sin(2.0 * x * M_PI)) * 2.0 / 3.0; ret += (20.0 * sin(x * M_PI) + 40.0 * sin(x / 3.0 * M_PI)) * 2.0 / 3.0; ret += (150.0 * sin(x / 12.0 * M_PI) + 300.0 * sin(x / 30.0 * M_PI)) * 2.0 / 3.0; return ret; } void transform_earth_from_mars(double lat, double lng, double* tarLat, double* tarLng) { if (transform_sino_out_china(lat, lng)) { *tarLat = lat; *tarLng = lng; return; } double dLat = transform_earth_from_mars_lat(lng - 105.0, lat - 35.0); double dLon = transform_earth_from_mars_lng(lng - 105.0, lat - 35.0); double radLat = lat / 180.0 * M_PI; double magic = sin(radLat); magic = 1 - ee * magic * magic; double sqrtMagic = sqrt(magic); dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * M_PI); dLon = (dLon * 180.0) / (a / sqrtMagic * cos(radLat) * M_PI); *tarLat = dLat; *tarLng = dLon; } // --- transform_earth_from_mars end --- // --- transform_mars_vs_bear_paw --- // 参考来源：http://blog.woodbunny.com/post-68.html const double x_pi = M_PI * 3000.0 / 180.0; void transform_mars_from_baidu(double gg_lat, double gg_lon, double *bd_lat, double *bd_lon) { double x = gg_lon, y = gg_lat; double z = sqrt(x * x + y * y) + 0.00002 * sin(y * x_pi); double theta = atan2(y, x) + 0.000003 * cos(x * x_pi); *bd_lon = z * cos(theta) + 0.0065; *bd_lat = z * sin(theta) + 0.006; } void transform_baidu_from_mars(double bd_lat, double bd_lon, double *gg_lat, double *gg_lon) { double x = bd_lon - 0.0065, y = bd_lat - 0.006; double z = sqrt(x * x + y * y) - 0.00002 * sin(y * x_pi); double theta = atan2(y, x) - 0.000003 * cos(x * x_pi); *gg_lon = z * cos(theta); *gg_lat = z * sin(theta); }