Imagine a text-message alert sent to a prospective homebuyer's mobile phone informing the buyer that there is a house in the immediate vicinity that fits the criteria they are seeking. The buyer saunters over to the house and calls the broker. Easy. And it is made possible by geo-fencing, a GPS-tracking tool. Geo-fencing currently exists to create a virtual perimeter GPS boundary around a physical geographic area. If someone leaves the area boundary, a notice (alert) is sent to disclose the departure outside the area, either by mobile phone or e-mail. For example, geo-fencing has been used to notify parents if their child leaves a designated area. Geo-fencing is also used to keep track of automobiles in a fleet, to prevent theft. Once the boundary is created, an alert is sent when an auto is taken outside of the boundary. Great. Now, think of geo-fencing in reverse. Instead of sending the notice when someone leaves the area, it sends the alert if someone crosses into the ...
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