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FireBoltt_ios/FireBoltt/Tool/TQLocationConverter.m

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//
// TQLocationConverter.m
//
//
// Created by qfu on 9/16/14.
// Copyright (c) 2014 tinyq. All rights reserved.
//
#import "TQLocationConverter.h"
#import <math.h>
#import <UIKit/UIGeometry.h>
static const double a = 6378245.0;
static const double ee = 0.00669342162296594323;
static const double pi = 3.14159265358979324;
static const double xPi = M_PI * 3000.0 / 180.0;
@implementation TQLocationConverter
+(CLLocationCoordinate2D)transformFromWGSToGCJ:(CLLocationCoordinate2D)wgsLoc
{
CLLocationCoordinate2D adjustLoc;
double adjustLat = [self transformLatWithX:wgsLoc.longitude - 105.0 withY:wgsLoc.latitude - 35.0];
double adjustLon = [self transformLonWithX:wgsLoc.longitude - 105.0 withY:wgsLoc.latitude - 35.0];
long double radLat = wgsLoc.latitude / 180.0 * pi;
long double magic = sin(radLat);
magic = 1 - ee * magic * magic;
long double sqrtMagic = sqrt(magic);
adjustLat = (adjustLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
adjustLon = (adjustLon * 180.0) / (a / sqrtMagic * cos(radLat) * pi);
adjustLoc.latitude = wgsLoc.latitude + adjustLat;
adjustLoc.longitude = wgsLoc.longitude + adjustLon;
return adjustLoc;
}
+ (double)transformLatWithX:(double)x withY:(double)y
{
double lat = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * sqrt(fabs(x));
lat += (20.0 * sin(6.0 * x * pi) + 20.0 *sin(2.0 * x * pi)) * 2.0 / 3.0;
lat += (20.0 * sin(y * pi) + 40.0 * sin(y / 3.0 * pi)) * 2.0 / 3.0;
lat += (160.0 * sin(y / 12.0 * pi) + 320 * sin(y * pi / 30.0)) * 2.0 / 3.0;
return lat;
}
+ (double)transformLonWithX:(double)x withY:(double)y
{
double lon = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * sqrt(fabs(x));
lon += (20.0 * sin(6.0 * x * pi) + 20.0 * sin(2.0 * x * pi)) * 2.0 / 3.0;
lon += (20.0 * sin(x * pi) + 40.0 * sin(x / 3.0 * pi)) * 2.0 / 3.0;
lon += (150.0 * sin(x / 12.0 * pi) + 300.0 * sin(x / 30.0 * pi)) * 2.0 / 3.0;
return lon;
}
+(CLLocationCoordinate2D)transformFromGCJToBaidu:(CLLocationCoordinate2D)p
{
long double z = sqrt(p.longitude * p.longitude + p.latitude * p.latitude) + 0.00002 * sin(p.latitude * xPi);
long double theta = atan2(p.latitude, p.longitude) + 0.000003 * cos(p.longitude * xPi);
CLLocationCoordinate2D geoPoint;
geoPoint.latitude = (z * sin(theta) + 0.006);
geoPoint.longitude = (z * cos(theta) + 0.0065);
return geoPoint;
}
+(CLLocationCoordinate2D)transformFromBaiduToGCJ:(CLLocationCoordinate2D)p
{
double x = p.longitude - 0.0065, y = p.latitude - 0.006;
double z = sqrt(x * x + y * y) - 0.00002 * sin(y * xPi);
double theta = atan2(y, x) - 0.000003 * cos(x * xPi);
CLLocationCoordinate2D geoPoint;
geoPoint.latitude = z * sin(theta);
geoPoint.longitude = z * cos(theta);
return geoPoint;
}
+(CLLocationCoordinate2D)transformFromGCJToWGS:(CLLocationCoordinate2D)p
{
double threshold = 0.00001;
// The boundary
double minLat = p.latitude - 0.5;
double maxLat = p.latitude + 0.5;
double minLng = p.longitude - 0.5;
double maxLng = p.longitude + 0.5;
double delta = 1;
int maxIteration = 30;
// Binary search
while(true)
{
CLLocationCoordinate2D leftBottom = [[self class] transformFromWGSToGCJ:(CLLocationCoordinate2D){.latitude = minLat,.longitude = minLng}];
CLLocationCoordinate2D rightBottom = [[self class] transformFromWGSToGCJ:(CLLocationCoordinate2D){.latitude = minLat,.longitude = maxLng}];
CLLocationCoordinate2D leftUp = [[self class] transformFromWGSToGCJ:(CLLocationCoordinate2D){.latitude = maxLat,.longitude = minLng}];
CLLocationCoordinate2D midPoint = [[self class] transformFromWGSToGCJ:(CLLocationCoordinate2D){.latitude = ((minLat + maxLat) / 2),.longitude = ((minLng + maxLng) / 2)}];
delta = fabs(midPoint.latitude - p.latitude) + fabs(midPoint.longitude - p.longitude);
if(maxIteration-- <= 0 || delta <= threshold)
{
return (CLLocationCoordinate2D){.latitude = ((minLat + maxLat) / 2),.longitude = ((minLng + maxLng) / 2)};
}
if(isContains(p, leftBottom, midPoint))
{
maxLat = (minLat + maxLat) / 2;
maxLng = (minLng + maxLng) / 2;
}
else if(isContains(p, rightBottom, midPoint))
{
maxLat = (minLat + maxLat) / 2;
minLng = (minLng + maxLng) / 2;
}
else if(isContains(p, leftUp, midPoint))
{
minLat = (minLat + maxLat) / 2;
maxLng = (minLng + maxLng) / 2;
}
else
{
minLat = (minLat + maxLat) / 2;
minLng = (minLng + maxLng) / 2;
}
}
}
static bool isContains(CLLocationCoordinate2D point, CLLocationCoordinate2D p1, CLLocationCoordinate2D p2)
{
return (point.latitude >= MIN(p1.latitude, p2.latitude) && point.latitude <= MAX(p1.latitude, p2.latitude)) && (point.longitude >= MIN(p1.longitude,p2.longitude) && point.longitude <= MAX(p1.longitude, p2.longitude));
}
/**
* 判断是不是在中国
* 用引射线法判断 点是否在多边形内部
* 算法参考：http://www.cnblogs.com/luxiaoxun/p/3722358.html
*/
+ (BOOL)isLocationOutOfChina:(CLLocationCoordinate2D)location {
CGPoint point = CGPointMake(location.latitude, location.longitude);
BOOL oddFlag = NO;
NSInteger j = [self polygonOfChina].count - 1;
for (NSInteger i = 0; i < [self polygonOfChina].count; i++) {
CGPoint polygonPointi = [[self polygonOfChina][i] CGPointValue];
CGPoint polygonPointj = [[self polygonOfChina][j] CGPointValue];
if (((polygonPointi.y < point.y && polygonPointj.y >= point.y) ||
(polygonPointj.y < point.y && polygonPointi.y >= point.y)) &&
(polygonPointi.x <= point.x || polygonPointj.x <= point.x)) {
oddFlag ^= (polygonPointi.x +
(point.y - polygonPointi.y) /
(polygonPointj.y - polygonPointi.y) *
(polygonPointj.x - polygonPointi.x) <
point.x);
}
j = i;
}
return !oddFlag;
}
// 中国大陆多边形，用于判断坐标是否在中国
// 因为港澳台地区使用WGS坐标，所以多边形不包含港澳台地区
+ (NSMutableArray *)polygonOfChina {
static NSMutableArray *polygonOfChina = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
polygonOfChina = [[NSMutableArray alloc] init];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(49.1506690000,
87.4150810000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(48.3664501790,
85.7527085300)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(47.0253058185,
85.3847443554)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(45.2406550000,
82.5214000000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(44.8957121295,
79.9392351487)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(43.1166843846,
80.6751253982)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(41.8701690000,
79.6882160000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(39.2896190000,
73.6171080000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(34.2303430000,
78.9155300000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(31.0238860000,
79.0627080000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(27.9989800000,
88.7028920000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(27.1793590000,
88.9972480000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(28.0969170000,
89.7331400000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(26.9157800000,
92.1615830000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(28.1947640000,
96.0986050000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(27.4094760000,
98.6742270000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(23.9085500000,
97.5703890000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(24.0775830000,
98.7846100000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(22.1375640000,
99.1893510000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(21.1398950000,
101.7649720000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(22.2746220000,
101.7281780000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(23.2641940000,
105.3708430000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(22.7191200000,
106.6954480000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(21.9945711661,
106.7256731791)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(21.4847050000,
108.0200530000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(20.4478440000,
109.3814530000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(18.6689850000,
108.2408210000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(17.4017340000,
109.9333720000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(19.5085670000,
111.4051560000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(21.2716775175,
111.2514995205)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(21.9936323233,
113.4625292629)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(22.1818312942,
113.4258358111)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(22.2249729295,
113.5913115000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(22.4501912753,
113.8946844490)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(22.5959159322,
114.3623797842)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(22.4334610000,
114.5194740000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(22.9680954377,
116.8326939975)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(25.3788220000,
119.9667980000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(28.3261276204,
121.7724402562)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(31.9883610000,
123.8808230000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(39.8759700000,
124.4695370000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(41.7350890000,
126.9531720000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(41.5142160000,
128.3145720000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(42.9842081790,
131.0676468344)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(45.2690810000,
131.8468530000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(45.0608370000,
133.0610740000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(48.4480260000,
135.0111880000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(48.0054800000,
131.6628800000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(50.2270740000,
127.6890640000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(53.3516070000,
125.3710040000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(53.4176040000,
119.9254040000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(47.5590810000,
115.1421070000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(47.1339370000,
119.1159230000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(44.8256460000,
111.2786750000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(42.5293560000,
109.2549720000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(43.2598160000,
97.2967290000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(45.4247620000,
90.9680590000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(47.8075570000,
90.6737020000)]];
[polygonOfChina
addObject:[NSValue valueWithCGPoint:CGPointMake(49.1506690000,
87.4150810000)]];
});
return polygonOfChina;
}
@end