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I’m planning to write an application for WP7 that help to find the bearing to a certain GPS location previously saved. So I need to know the current bearing in order to draw a line pointing to the start location, but I can have this information in two way: one with the Compass, and if the user is moving by calculating an agle from the GPS coordinate offset. Whicj one is more accurate? Does it make sense to swich from Compass to calculated bearing when the user move?
it could make sense is if the user is facing say south but travelling north, such as on a bus or train.