# How does PinFlag map a golf course? > Canonical: https://pinflag.io/answers/courses-and-maps/how-does-pinflag-map-a-golf-course Each hole ships inside the app as a course map: tee, fairway, rough, bunkers, fringe, green and the hazards, with the boundaries. The app reads your position and your target off the map to find the lie, and every strokes gained number, before the swing and after it, is priced from the table for the surface the ball is on. Topic: Courses and course maps, https://pinflag.io/answers/courses-and-maps ## Plain facts - PinFlag is an iPhone app; the course maps and every shot live on your phone, so it works anywhere on the course. - PinFlag is launching on the App Store; the download page takes an email and tells you the day it is live. - Every number is strokes gained on Mark Broadie’s published PGA TOUR baselines, priced on the same published baselines in the app and on this site. - PinFlag prices the target you choose, with your own dispersion and the lie read from the course map; the decision stays yours, with the arithmetic done. - Every number is labeled Measured (your own data) or Estimated (a benchmark standing in), and the two are never blended. - Pins you set during a round are yours, and every round exports as CSV or JSON on request.