GPS is a space-based satellite navigation system that provides location and time information.

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convert GPS to x,y using reference node

i am using sensor nodes and their antenna to calculate GPS coordinates as notation of (degrees/minutes/seconds), i have some question of how to do these things: how can i convert latitude and ...
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How to know the exact country or province from the longitude and latitude information automatically?

To be more specific, how to find all of point (from 1,000,000 items) located in England, or located in California? I need to process over 1,000,000 items, so a offline and automatic way is needed. ...