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i do some experiment place two sensor node between them 4 meter as distance.

then i get these GPS information:

node1: Latitude: 32, 33.255 , Longitude: 36, 0.6632

node2: Latitude: 32, 33.228 , Longitude: 36, 0.6588

then to try to find the distance between them i use this Link, but i surprised that the distance calculated is 50 meters !!!!!

how can i go over this problem !

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For starters, you may want to check if the coordinates for your nodes are correct, because I just plotted them in Google Earth and they are 50 m apart. It may also be a problem with the accuracy of the GPS used

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You also barely have enough digits in the values to differentiate at the meter-level. – mkennedy Apr 19 '13 at 17:05
Antonio , can you give me the link of google which you used ? – Hanaa Apr 20 '13 at 2:52
Sure just download Google Earth for your platform – Antonio Locandro Apr 21 '13 at 5:14

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