iphone iOS mapkit, filter a list of points(Longitude, Latitude) by Nearest -

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i have list of points of interest in plist file containing point info + longitude & latitude.

i wonder how show in mapview nearest points me according radius ?

example : radius = 2km --> show top 20 nearest pins location

calculate distance between position , points sort , filter results.

to calculate distance use distancefromlocation


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