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I've been having the hardest time trying to figure out why distanceFromLocation isn't calculting the correct distance for two CLLocations. The calculated result is a number WAY larger than the actual distance but the two locations appear to be valid locations.

First of all, here are the two locations:

LOCATION 1: <+44.56697840, -69.55759810> +/- 0.00m (speed -1.00 mps / course -1.00) @ 2010-12-13 21:12:03 -0500
LOCATION 2: <+44.31400400, -69.79157000> +/- 0.00m (speed -1.00 mps / course -1.00) @ 2010-12-13 21:12:03 -0500

And here is the code where Location1 and Location2 are being declared. I've verified that these are the correct values, but I still can't figure this out

CLLocation *newLocation = [[CLLocation alloc] 
    initWithLatitude:[latitude doubleValue] 
    longitude:[longitude doubleValue]];
    // CURRENT LOCATION (OR SEARCHED LOCATION)

double dLat = 0;
int tmpDistance = 0;
id returnId = nil;

id tmp = [featuredResults objectAtIndex:i];
CLLocation *newLocation2 = [[CLLocation alloc] 
    initWithLatitude:[[tmp valueForKey:@"lat"] doubleValue]  
    longitude:[[tmp valueForKey:@"lng"] doubleValue]];

dLat = [newLocation distanceFromLocation:newLocation2];

The value that I'm getting for dLat is 330707027, which is way wrong. Does anyone know where I might be going wrong? Thanks!

BenG
  • 11
  • 3

1 Answers1

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This test code based on the one in the question gives about 33,669 meters:

CLLocation *newLocation = [[CLLocation alloc] 
    initWithLatitude:44.56697840 longitude:-69.55759810];

CLLocation *newLocation2 = [[CLLocation alloc] 
    initWithLatitude:44.31400400 longitude:-69.79157000];

double dLat = [newLocation distanceFromLocation:newLocation2];

NSLog(@"distance = %f meters", dLat);

[newLocation release];
[newLocation2 release];

Output:

distance = 33669.002406 meters

Perhaps you are logging dLat using something other than %f?