ios7 - How to properly set the Radius of CLRegion? -

this code creating geofence:

geofence *geofence = [[geofence alloc] init]; [geofence setradius:100.0]; [geofence setidentifier: @"fence1"]; [geofence setlocation:currentlocation];   clregion *region1 =  [[clcircularregion alloc] initwithcenter:[geofence.location coordinate]                                                radius:geofence.radius                                                identifier:geofence.identifier];  region1.notifyonentry=yes; region1.notifyonexit=yes; [self.locationmanager startmonitoringforregion:region1]; 

i that, above code works, meaning geofence have been created. there's problem i've been encountering.

i have .gpx files (in using simulation of current location), distances center of region/geofence follows: 55m, 90m, 150m, 200m, 300m, 500m, 1km, 5km , 10km.

my problem is, seems geofence radius not 100m, because when simulate using gpx files distance center of geofence 55m, 90m, 150, 200m, 300m, 500m, 1km. delegate methods of locationmanager -didenterregion , -didexitregion making respond i'm within geofence radius "100m".

only gpx files distances geofence center 5km , 10km responds said delegate methods i'm outside geofence.

can me resolve scenario guys?

i think problem may using same variables initialize region ones using initialize geofence far center coordinates concerned. 1 thinks within other.