I am trying to find the distance in miles using the latitude and longitude. I have the following method:
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
if(!newLocation) return;
if ((oldLocation.coordinate.latitude != newLocation.coordinate.latitude) &&
(oldLocation.coordinate.longitude != newLocation.coordinate.longitude))
{
CLLocation *loc1 = [[CLLocation alloc] initWithLatitude:oldLocation.coordinate.latitude longitude:oldLocation.coordinate.longitude];
CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.latitude];
CLLocationDistance distance = ([loc2 distanceFromLocation:loc1]) * 0.000621371192;
//distance = distance;
NSLog(#"Total Distance %f in miles",distance);
}
}
For some reason it prints out something like 5678.32 miles. The location is pretty much stationary and not moving at all.
CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.(!!!!!)latitude longitude:newLocation.coordinate.(!!!!!)latitude];
You are initializing loc2 with the latitude of the new location for both the longitude and the latitude:
This line:
CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.latitude];
Should say:
CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.longitude];
Hope it helps!
Related
I am using a method to get my location:
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
CLLocation *currentLocation = newLocation;
NSLog(#"%#", currentLocation);}
//new method to find the distance
-(void) zoomToNearestSpot: (NSArray *) spot location: (CLLocation *)myLocation
{
myLocation = currentLocation;
spot = chSpot;
for (int i=0; i< spot.count; i++)
{
ChargingSpots *mySpot = [spot objectAtIndex:i];
CLLocation *thePoint = [[CLLocation alloc]initWithLatitude:[mySpot.LocationLat doubleValue] longitude:[mySpot.LocationLong doubleValue]];
CLLocationDistance dist = [myLocation distanceFromLocation:thePoint];
NSLog(#"%f", dist);
you get here **distance** in meter so in assumption **20 miles = 32187 meter**
put condition such like
if(distance <= 32187)
{
// under 20 miles you can add the zoom level
}
else
{
// out of 20 miles
}
}
}
First, I need to show all of the spots on the map by zooming out according to their number then find the nearest spots and zoom in the camera on them in.
you have more the two coordinate
1) current (user Location)
2) another coordinate ..
Here distanceFromLocation: method is use for get distance between two location.
CLLocationDistance distance = [currentLOcation distanceFromLocation:anotherLocation];
for example where you need add the following lines
-(void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
CLLocation *currentLocation = newLocation;
for (int i=0; i<chSpot.count; i++)
{
ChargingSpots *spot = [chSpot objectAtIndex:i];
NSString *locLat = spot.LocationLat;
NSString *locLong = spot.LocationLong;
CLLocation *LocationAtual = [[CLLocation alloc] initWithLatitude: locLat longitude: locLong];
CLLocationDistance distanceBetween = [currentLocation
distanceFromLocation: LocationAtual];
NSString *tripString = [[NSString alloc]
initWithFormat:#"%f",
distanceBetween];
NSLog(#"DIST: %f", tripString);
}
}
you can use this code
1.) CLLocation *loc=[[CLLocation alloc]initWithLatitude:spot.LocationLat longitude:spot.LocationLong];
2.) CLLocationDistance distanceInMeters=[currentLocation distanceFromLocation:loc];
This will help.ThankYou
I'm trying to calculate and return the distance between two points and I'm getting a ridiculous number. I've tried both a user-defined haversine method and the distanceFromLocation method and they are both returning 10282657.652... for the distance between lat = 32.60641072/ lon = -85.48713530 and lat = 32.605638 and lon = -85.486890. Are these distances too close?
CLLocation *startLocation = [[CLLocation alloc] initWithLatitude:currentLocation.coordinate.latitude longitude:currentLocation.coordinate.latitude];
CLLocation *endLocation = [[CLLocation alloc] initWithLatitude:_head.lattitude longitude:_head.longitude];
double distance = [startLocation distanceFromLocation:endLocation];
CLLocationCoordinate2D newCoordinate = [startLocation coordinate];
CLLocationCoordinate2D oldCoordinate = [endLocation coordinate];
double distance2 = [self distanceFrom:newCoordinate to:oldCoordinate];
NSNumber *myDoubleNumber = [NSNumber numberWithDouble:distance2];
_charLabel.text = [myDoubleNumber stringValue];
CLLocation *location1 = [[CLLocation alloc] initWithLatitude:lat1 longitude:lon1];
CLLocation *location2 = [[CLLocation alloc] initWithLatitude:lat2 longitude:lon2];
CLLocationDistance distance= [location1 distanceFromLocation:location2]*1.09361;
"distance" will return on meter.
This code worked for me :)
In this code I receive a wrong distance, _latitude and _longtitude are NSString.
Any suggestion to correct this?
CLLocationManager *locationManager = [[CLLocationManager alloc] init];
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
CLLocation *location = [locationManager location];
CLLocationCoordinate2D coord;
coord.latitude = [_latitude doubleValue];
coord.longitude = [_longitude doubleValue];
CLLocation *anotLocation = [[CLLocation alloc] initWithLatitude:coord.latitude longitude:coord.longitude];
_distancia = [NSNumber numberWithFloat:([location distanceFromLocation:anotLocation]/1000)];
check out this singleton implementation of location controller
https://github.com/hackerinheels/locationcontroller
with this just call
CLLocation *currLocation = [[LocationController sharedLocationInterface]getCurrentLocation];
This question already has answers here:
Calculate distance between two place using latitude-longitude in gmap for iPhone [duplicate]
(2 answers)
Closed 8 years ago.
I tried to calculate the distance between two locations but something is wrong because the distance is 0 every time.
float oldLatitude = [gInfo.latitude floatValue];
float oldLongitude = [gInfo.longitude floatValue];
CLLocation *oldLocation = [[CLLocation alloc] initWithLatitude:oldLatitude longitude:oldLongitude];
CLLocation *newLocation = [[CLLocation alloc] initWithLatitude:newLatitude longitude:newLongitude];
if (newLatitude == 0 && newLongitude == 0) {
[self showAlarm2];
return;
}
float distance = [newLocation distanceFromLocation:oldLocation];
// distance 0 ????????
int result = (int)roundf(distance );
if (result < 0) {
result = -result;
}
// long result = (long)distance;
NSLog(gInfo.name );
NSLog(#"Distance i meters: %i", result);
//**************** filter group by check distance *************
if (result <= 10) {
[viewArray addObject:gInfo];
}
Use this
CLLocationManager *locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.distanceFilter = kCLDistanceFilterNone;
[locationManager startUpdatingLocation];
CLLocation *location = [locationManager location];
// Configure the new event with information from the location
CLLocationCoordinate2D coordinate = [location coordinate];
latitude = coordinate.latitude;
longitude = coordinate.longitude;
MKCoordinateRegion myRegion;
MKCoordinateSpan mySpan;
mySpan.latitudeDelta = 1.0f;
mySpan.longitudeDelta = 1.0f;
myRegion.center = coordinate;
myRegion.span = mySpan;
//-----------------------------------------------
NSDictionary *dict = (NSDictionary*)[arrayJsonData objectAtIndex:indexPath.row];
CLLocation *locA = [[CLLocation alloc] initWithLatitude:latitude longitude:longitude];
CLLocation *locB = [[CLLocation alloc] initWithLatitude:[[dict1 valueForKey:#"Latitude"] doubleValue] longitude:[[dict1 valueForKey:#"Longitude"] doubleValue]];
CLLocationDistance distance = [locA distanceFromLocation:locB];
double distanceInMiles = (distance/CONVERSION_TO_MILES);
// CONVERSION_TO_MILES 1609.344
I have currently this setup and I would love to change from Km to Miles in calculating distance. Here's my current code:
CLLocation *userloc = [[CLLocation alloc] initWithLatitude:locationManager.location.coordinate.latitude longitude:locationManager.location.coordinate.longitude];
CLLocation *loc = [[CLLocation alloc] initWithLatitude:lat longitude:lon];
CLLocationDistance distance2 = [userloc distanceFromLocation:loc]/ 1000;
NSLog(#"%f",distance2);
[distance setText:[NSString stringWithFormat:#"%.2f km", distance2]];
}
It's a simple conversion:
CLLocationDistance distance2 = [userloc distanceFromLocation:loc] * 0.000621371;
NSLog(#"%f",distance2);
[distance setText:[NSString stringWithFormat:#"%.2f mi", distance2]];