यह Link अपनी भाषा में मौजूद नहीं है, में देखें: English (en),
या गूगल अनुवाद का उपयोग:  
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http://edn.link/amazongpsarea

This link takes one to Amazon to view a list of GPS-based area measurement devices.  We have no particular recommendation.  This is a starting point for the concept of area measurement.  Note that there are some that have more capability for international use - units of measure, language, etc.