CLGeocoder Reverse Geocode considering horizontal accuracy - ios

Question

Is there a good solution to reverse geocode considering the horizontal accuracy of the location?
For instance this is the result for the location (and is regardless of horizontal accuracy):
{
City = "San Francisco";
Country = "United States";
CountryCode = US;
FormattedAddressLines = (
"246 Powell St",
"San Francisco, CA 94102-2206",
"United States"
);
Name = "246 Powell St";
PostCodeExtension = 2206;
State = CA;
Street = "246 Powell St";
SubAdministrativeArea = "San Francisco";
SubLocality = "Union Square";
SubThoroughfare = 246;
Thoroughfare = "Powell St";
ZIP = 94102;
}
I would like to get the result considering accuracy. E.g.:
accuracy: 10m; result: 246 Powell St
accuracy: 100m; result: Union Square
...
accuracy: 100km; result: San Francisco
I have figured I could probably do this by requesting reverse geocoding for multiple coordinates that are roughly on the edges of the provided horizontal accuracy and then intersecting the results. But is there a more clean way?

Answer 1

Did you mean CLGeocoder?
I think that requesting multiple reverse geocoding will probably do more harm then good.
From Apple's CLGeocoder documentation (which can be found here):
Applications should be conscious of how they use geocoding.
Geocoding requests are rate-limited for each app,
so making too many requests in a short period of time
may cause some of the requests to fail.
So I suggest not going this way.
Could be better ways, but just at the top of my head, you could probably use some sort of if-else method that uses the horizontalAccuracy property.
It's been a while since I've used MapKit so could be that my code below isn't 100% accurate but I can't test its functionality at the moment (it should compile though), but it'll give you an idea of how this can be done.
For example:
// here geocoder is your CLGeocoder object
// and location is the CLLocation you try to reverse geocode
[geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
if(error) {
NSLog(#"Error occurred: %#", [error localizedDescription]);
} else { // No error has occurred
if([placemarks count]) { // Just another step of precaution
CLPlacemark *placemark = placemarks[0]; // assume the first object is our correct place mark
if(location.horizontalAccuracy <= 10) { // equal or less than 10 meters
NSLog(#"Result: %# %#", placemark.subThoroughfare, placemark.thoroughfare); // 246 Powell St
} else if (location.horizontalAccuracy <= 100) { // equal or less than 100 meters
NSLog(#"Result: %#", placemark.subLocality); // Union Square
} else if (location.horizontalAccuracy <= 100000) { // equal or less than 100km
NSLog(#"Result: %#", placemark.subAdministrativeArea); // San Francisco
}
}
}
}];
When I would be able to test its functionality myself (could be a couple of hours, or a couple of days) I would edit if changes needed to be made.
Let me know if you are having issues or you have more questions.
Good luck mate.