def findMostDescriptivePoint(listLatLng,delta):
count=(len(listLatLng)*delta)/100;
distList,graph=gutility.compuPostCodeGraphs(listLatLng);
mean=stat.meanFloat(distList);
rList=[]
index=gutility.removeNode(rList,graph,mean,count,0)
return [listLatLng[i] for i in index];
def computeRadiusDistance(meanPoint,listPoint):
d=map(lambda x: getDistance(x,meanPoint),listPoint)
valueMean=stat.meanFloat(d);
valueSigma=stat.sigmaFloat(d)
return valueMean +2*valueSigma;