Hey guy's so recently I was working on an APP that used GPS to locate the positions Latitude & Longitude of a device. Now that all fine and dandy when you're outdoors but as soon as you go indoors its a whole different ball game, because the device does not have clear line of sight to the satellites it cannot accurately (within a reasonable margin of error 1-2 meters) get the correct position of the device. So GPS was out the windows and I started looking at other solutions and figured where better to ask these questions than hak5. So far what i have learned is that in doors the position