如何删除错误的GPS坐标

Question

如下图所示，当我跟踪用户活动（步行，骑自行车或驾驶）时，GPS坐标突然跳跃。

我不知道如何解决这个问题，即使我已经尝试了多种方法来解决，但作为参考，我也在下面发布了我的代码。

在这张图片截图中，我把车停在校园里然后来到了我的办公室，但它告诉我，我去了Harvest Ln，这是不对的。

   -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{



    iNEAT_o_GamesAppDelegate *appDelegate = (iNEAT_o_GamesAppDelegate *)[[UIApplication sharedApplication] delegate];

    CoordinateModel *coord = [[CoordinateModel alloc] init];

    ActivityType currentActivityType = [DataManager sharedInstance].activityType;

    for(int i=0;i<locations.count;i++){
        CLLocation * newLocation = [locations objectAtIndex:i];
        CLLocationCoordinate2D theLocation = newLocation.coordinate;
        CLLocationAccuracy theAccuracy = newLocation.horizontalAccuracy;
        NSTimeInterval locationAge = -[newLocation.timestamp timeIntervalSinceNow];

        if (locationAge > 30.0)
            continue;

        //Select only valid location and also location with good accuracy
        if(newLocation!=nil&&theAccuracy>0
           &&theAccuracy<2000
           &&(!(theLocation.latitude==0.0&&theLocation.longitude==0.0))){
            coord.latitude = theLocation.latitude;
            coord.longitude = theLocation.longitude;

                   if (currentActivityType == 0) {
                        // walking
                        [appDelegate.walkingCoordinates addObject:coord];
                    }
                    else if(currentActivityType == 1) {
                        [appDelegate.bikingCoordinates addObject:coord];
                    }
                    else if(currentActivityType == 2) {
                        // driving
                        [appDelegate.drivingCoordinates addObject:coord];
                    }
        }
    }
}

Answer 1

我为步行活动添加了另一个条件，仅限制在0-60米之间的准确度。并且工作得非常好。感谢Allessandro和Skladek的反馈。

 -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{




    iNEAT_o_GamesAppDelegate *appDelegate = (iNEAT_o_GamesAppDelegate *)[[UIApplication sharedApplication] delegate];

    CoordinateModel *coord = [[CoordinateModel alloc] init];

    ActivityType currentActivityType = [DataManager sharedInstance].activityType;

    for(int i=0;i<locations.count;i++){
        CLLocation * newLocation = [locations objectAtIndex:i];
        CLLocationCoordinate2D theLocation = newLocation.coordinate;
        CLLocationAccuracy theAccuracy = newLocation.horizontalAccuracy;
        NSTimeInterval locationAge = -[newLocation.timestamp timeIntervalSinceNow];

        if (locationAge > 30.0)
            continue;

        //Select only valid location and also location with good accuracy
        if(newLocation!=nil&&theAccuracy>0
           &&theAccuracy<2000
           &&(!(theLocation.latitude==0.0&&theLocation.longitude==0.0))){
            coord.latitude = theLocation.latitude;
            coord.longitude = theLocation.longitude;

                   if (currentActivityType == 0 && theAccuracy<60) {
                        // walking
                        [appDelegate.walkingCoordinates addObject:coord];
                    }
                    else if(currentActivityType == 1) {
                        [appDelegate.bikingCoordinates addObject:coord];
                    }
                    else if(currentActivityType == 2) {
                        // driving
                        [appDelegate.drivingCoordinates addObject:coord];
                    }
        }
    }
}