iOS定位坐标转换工具-b

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坐标转换

一、坐标简介
目前国内主流坐标系类型主要有三种：WGS84、GCJ02、BD09；
1.WGS84：为一种大地坐标系，也是目前广泛使用的GPS全球卫星定位系统使用的坐标系，如：iOS系统自带地图坐标。

GCJ02：是由中国国家测绘局制订的地理信息系统的坐标系统，是由WGS84坐标系经加密后的坐标系，如：高德地图、google地图、soso地图、aliyun地图、mapabc地图和amap地图所用坐标
BD09：百度坐标系，在GCJ02坐标系基础上再次加密。其中BD09ll表示百度经纬度坐标，BD09mc表示百度墨卡托米制坐标，如：百度地图所用坐标

二、一般项目集成的sdk都支持别的坐标转成自己的坐标，如百度地图支持WGS84和GCJ02转BD09ll，也支持BD09ll转GCJ02，但是，下面就主要介绍一下GCJ02和BD09ll转WGS84

二、BD09ll转GCJ02

/** 百度坐标转高德坐标 @param glat 纬度 @param glon 经度 @return 数组【转换后的纬度，转换后的经度】 */ + (NSArray *)bd09llToGCJLat:(double)glat lon:(double)glon { double X_PI = M_PI * 3000.0 / 180.0; double x = glon - 0.0065; double y = glat - 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); double lat = z * sin(theta); double lon = z * cos(theta); NSArray *latlon = @[[NSNumber numberWithDouble:lat],[NSNumber numberWithDouble:lon]]; return latlon; }

三、GCJ02转WGS84（只支持国内）

/** 高德坐标转系统自带坐标 @param array 数组需要转换的坐标【纬度，经度】 @return 数组【转换后的纬度，转换后的经度】 */ + (NSArray *)gcjToWGS:(NSArray *)array { double lat = [array.firstObject doubleValue]; double lon = [array.lastObject doubleValue]; if ([self outOfChinalat:lat lon:lon]){ return @[[NSNumber numberWithDouble:lat],[NSNumber numberWithDouble:lon]]; } NSArray *latlon = [self deltalat:lat lon:lon]; return latlon; }+ (BOOL)outOfChinalat:(double)lat lon:(double)lon { if (lon < 72.004 || lon > 137.8347) return true; if (lat < 0.8293 || lat > 55.8271) return true; return false; }+ (NSArray *)deltalat:(double)wgLat lon:(double)wgLon { double OFFSET = 0.00669342162296594323; double AXIS = 6378245.0; double dLat = [self transformLatx:(wgLon - 105.0) lon:(wgLat - 35.0)]; double dLon = [self transformLonx:(wgLon - 105.0) lon:(wgLat - 35.0)]; double radLat = wgLat / 180.0 * M_PI; double magic = sin(radLat); magic = 1 - OFFSET * magic * magic; double sqrtMagic = sqrt(magic); dLat = (dLat * 180.0) / ((AXIS * (1 - OFFSET)) / (magic * sqrtMagic) * M_PI); dLon = (dLon * 180.0) / (AXIS / sqrtMagic * cos(radLat) * M_PI); return @[[NSNumber numberWithDouble:(wgLat - dLat)],[NSNumber numberWithDouble:(wgLon - dLon)]]; }+ (double)transformLatx:(double)x lon:(double)y { double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * sqrt(abs(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)transformLonx:(double)x lon:(double)y { double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * sqrt(abs(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; }

四、BD09ll转WGS84，目前的做法是先将BD09ll坐标转成GCJ02坐标，然后再转成WGS84坐标。

五、经实测，转换后的坐标，另GCJ02坐标转WGS84坐标有一个更精确的算法，不过里面设计到了递归。

------------------------------打开地图的方式---------------------

//手机自带地图

//当前位置

MKMapItem *mylocation = [MKMapItemmapItemForCurrentLocation];

//前面填写纬度

CLLocationCoordinate2D coords2 =CLLocationCoordinate2DMake(cell.model.coordinate.latitude, cell.model.coordinate.longitude);

//目的地的位置

MKMapItem *toLocation = [[MKMapItemalloc] initWithPlacemark:[[MKPlacemarkalloc] initWithCoordinate:coords2addressDictionary:nil]];

toLocation.name =cell.model.title;

NSArray *items = [NSArrayarrayWithObjects:mylocation, toLocation,nil];

NSDictionary *options =@{ MKLaunchOptionsDirectionsModeKey:MKLaunchOptionsDirectionsModeDriving,MKLaunchOptionsMapTypeKey: [NSNumbernumberWithInteger:MKMapTypeStandard],MKLaunchOptionsShowsTrafficKey:@YES};

//打开苹果自身地图应用，并呈现特定的item

[MKMapItemopenMapsWithItems:items launchOptions:options];

//百度地图

if ([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"baidumap://"]]) {//判断是否安装了百度地图APP
NSString *urlString = [[NSString stringWithFormat:@"baidumap://map/marker?location=%f,%f&title=%@&content=%@&src=webapp.marker.yourCompanyName.yourAppName",cell.model.coordinate.latitude,cell.model.coordinate.longitude,cell.stroeNameLab.text,cell.stroeAddressLab.text] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlString]];

}else{}

//高德地图

NSString *urlString = [[NSStringstringWithFormat:@"iosamap://navi?sourceApplication=%@&backScheme=%@&lat=%f&lon=%f&dev=0&style=2",cell.model.title,@"baidumap",cell.model.coordinate.latitude, cell.model.coordinate.longitude]stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

[[UIApplicationsharedApplication] openURL:[NSURLURLWithString:urlString]];

----------------------

//跳到地图导航

- ( void ) btnPermanentAddressClick

{

NSString * appName = @ "自己的app名字" ;

NSString * urlScheme = @ "自己的urlScheme" ;

UIAlertController * alert = [ UIAlertController alertControllerWithTitle : @ "选择地图" message : nil preferredStyle : UIAlertControllerStyleActionSheet ] ;

UIAlertAction * appleMap = [ UIAlertAction actionWithTitle : @ "苹果地图" style : UIAlertActionStyleDefault handler : ^ ( UIAlertAction * action ) {

if ( [ [ UIApplication sharedApplication ] canOpenURL : [ NSURL URLWithString : @ "baidumap://" ] ] )

{

//地理编码器

CLGeocoder * geocoder = [ [ CLGeocoder alloc ] init ] ;

[ geocoder geocodeAddressString : @ "上海嘉定区伊宁路2000号" completionHandler : ^ ( NSArray < CLPlacemark * > * _Nullable placemarks , NSError * _Nullable error ) {

for ( CLPlacemark * placemark in placemarks ) {

//坐标(经纬度)

CLLocationCoordinate2D coordinate = placemark . location . coordinate ;

MKMapItem * currentLocation = [ MKMapItem mapItemForCurrentLocation ] ;

MKMapItem * toLocation = [ [ MKMapItem alloc ] initWithPlacemark : [ [ MKPlacemark alloc ] initWithCoordinate : coordinate addressDictionary : nil ] ] ;

[ MKMapItem openMapsWithItems : @ [ currentLocation , toLocation ]

launchOptions : @ { MKLaunchOptionsDirectionsModeKey : MKLaunchOptionsDirectionsModeDriving ,

MKLaunchOptionsShowsTrafficKey : [ NSNumber numberWithBool : YES ] } ] ;

}

} ] ;

} else {

[ NXPopAlertViewLabel showMessage : @ "您的手机没有安装苹果地图" ] ;

}

} ] ;

UIAlertAction * baiduMap = [ UIAlertAction actionWithTitle : @ "百度地图" style : UIAlertActionStyleDefault handler : ^ ( UIAlertAction * action ) {

if ( [ [ UIApplication sharedApplication ] canOpenURL : [ NSURL URLWithString : @ "baidumap://" ] ] )

{

//地理编码器

CLGeocoder * geocoder = [ [ CLGeocoder alloc ] init ] ;

[ geocoder geocodeAddressString : @ "上海嘉定区伊宁路2000号" completionHandler : ^ ( NSArray < CLPlacemark * > * _Nullable placemarks , NSError * _Nullable error ) {

for ( CLPlacemark * placemark in placemarks ) {

//坐标(经纬度)

CLLocationCoordinate2D coordinate = placemark . location . coordinate ;

NSString * urlString = [ [ NSString stringWithFormat : @ "baidumap://map/direction?origin={{我的位置}}&destination=latlng:%f,%f|name=目的地&mode=driving&coord_type=gcj02" , coordinate . latitude , coordinate . longitude ] stringByAddingPercentEncodingWithAllowedCharacters : [ NSCharacterSet URLQueryAllowedCharacterSet ] ] ;

[ [ UIApplication sharedApplication ] openURL : [ NSURL URLWithString : urlString ] options : @ { } completionHandler : nil ] ;

}

} ] ;

} else {

[ NXPopAlertViewLabel showMessage : @ "您的手机没有安装百度地图" ] ;

}

} ] ;

UIAlertAction * gaodeMap = [ UIAlertAction actionWithTitle : @ "高德地图" style : UIAlertActionStyleDefault handler : ^ ( UIAlertAction * action ) {

if ( [ [ UIApplication sharedApplication ] canOpenURL : [ NSURL URLWithString : @ "iosamap://" ] ] )

{

//地理编码器

CLGeocoder * geocoder = [ [ CLGeocoder alloc ] init ] ;

[ geocoder geocodeAddressString : @ "上海嘉定区伊宁路2000号" completionHandler : ^ ( NSArray < CLPlacemark * > * _Nullable placemarks , NSError * _Nullable error ) {

for ( CLPlacemark * placemark in placemarks ) {

//坐标(经纬度)

CLLocationCoordinate2D coordinate = placemark . location . coordinate ;

NSString * urlString = [ [ NSString stringWithFormat : @ "iosamap://navi?sourceApplication=%@&backScheme=%@&lat=%f&lon=%f&dev=0&style=2" , appName , urlScheme , coordinate . latitude , coordinate . longitude ] stringByAddingPercentEncodingWithAllowedCharacters : [ NSCharacterSet URLQueryAllowedCharacterSet ] ] ;

[ [ UIApplication sharedApplication ] openURL : [ NSURL URLWithString : urlString ] options : @ { } completionHandler : nil ] ;

}

} ] ;

} else {

[ NXPopAlertViewLabel showMessage : @ "您的手机没有安装高德地图" ] ;

}

} ] ;

UIAlertAction * gugeMap = [ UIAlertAction actionWithTitle : @ "谷歌地图" style : UIAlertActionStyleDefault handler : ^ ( UIAlertAction * action ) {

if ( [ [ UIApplication sharedApplication ] canOpenURL : [ NSURL URLWithString : @ "comgooglemaps://" ] ] )

{

//地理编码器

CLGeocoder * geocoder = [ [ CLGeocoder alloc ] init ] ;

[ geocoder geocodeAddressString : @ "上海嘉定区伊宁路2000号" completionHandler : ^ ( NSArray < CLPlacemark * > * _Nullable placemarks , NSError * _Nullable error ) {

for ( CLPlacemark * placemark in placemarks ) {

//坐标(经纬度)

CLLocationCoordinate2D coordinate = placemark . location . coordinate ;

NSString * urlString = [ [ NSString stringWithFormat : @ "comgooglemaps://?x-source=%@&x-success=%@&saddr=&daddr=%f,%f&directionsmode=driving" , appName , urlScheme , coordinate . latitude , coordinate . longitude ] stringByAddingPercentEncodingWithAllowedCharacters : [ NSCharacterSet URLQueryAllowedCharacterSet ] ] ;

[ [ UIApplication sharedApplication ] openURL : [ NSURL URLWithString : urlString ] options : @ { } completionHandler : nil ] ;

}

} ] ;

} else {

[ NXPopAlertViewLabel showMessage : @ "您的手机没有安装谷歌地图" ] ;

}

} ] ;

UIAlertAction * cancel = [ UIAlertAction actionWithTitle : @ "取消" style : UIAlertActionStyleDefault handler : ^ ( UIAlertAction * action ) {

} ] ;

[ alert addAction : appleMap ] ;

[ alert addAction : baiduMap ] ;

[ alert addAction : gaodeMap ] ;

[ alert addAction : gugeMap ] ;

[ alert addAction : cancel ] ;

[ self presentViewController : alert animated : YES completion : ^ {

} ] ;

}

参考链接

https://www.cnblogs.com/huahua0809/p/5235670.html

https://blog.csdn.net/autom_lishun/article/details/54092420

https://www.jianshu.com/p/b7fa7253bc1b

https://www.jianshu.com/p/ee83aed42d6d

https://www.jianshu.com/p/27dbe24e8771

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