Video demo of creating a new geofencing -- Geo fence

Cooper

Learn how to create a new Geo fence with this step-by-step video demo. Perfect for GPS tracking, real-time location monitoring, and enhancing security with electronic monitoring systems. Ideal for businesses and personal use.

Video demo of creating a new geofencing

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Geo fence

This video demonstrates how to establish different types of Geo fence for a surveillance target in the Traxbean system.
The system supports Geo fence in the shapes of polygons, rectangles, and circles. It allows for the location of points on a map through address positioning, and enables the specification of the radius of the electronic fence, as well as the drawing and naming of the electronic fence.

Geo fence

How does the Geo fence work?

As shown in the figure, the administrator pre-defines a series of coordinate data on the server to delineate the scope of the Geo fence.

The positioning device regularly reports its location data to the server, which includes coordinate data and positioning time. The server compares the adjacent two sets of location data with the electronic fence range and infers whether the device has entered or left the fence based on the comparison results:

  • If the previous location data (A) is outside the fence and the subsequent data (A1) is inside the fence, an “entry into the fence alarm” will be triggered.
  • If the previous location data (B) is inside the fence and the subsequent data(B1) is outside the fence, a “fence exit alarm” will be triggered.
  • If both sets of data are inside or outside the fence, no alarm will be triggered.

How are false alarms/missed alarms/delayed alarms generated?

If the time interval for the device to upload location data is long, or if the device enters a building, tunnel, valley, or between high-rise buildings causing positioning failure, the distance between adjacent location data may be significant. The device may have actually crossed the fence range, but the server receives two adjacent sets of location data that both fall outside the fence range, resulting in no alarm being triggered and causing a missed alarm.

As shown in the figure above, the coordinates C and C1 are both outside the fence. Therefore, no fence alarm will be triggered. In reality, the device crossed the fence range between the two data points, but the server, based only on C and C1, cannot determine the device’s actual movement path, resulting in a missed alarm.

Is the Geo fence a function of the device end or the server end?

The electronic fence is a server-side software function. The data processing occurs on the server side and does not require computation on the device end. The location data processed by the electronic fence comes from the device. As long as the device regularly reports its location data to the server, the server can implement the electronic fence function.

Does positioning accuracy affect the accuracy rate of fence alarms? How to improve alarm accuracy?

Yes. Each positioning method is influenced by various factors, resulting in different positioning accuracies. Due to insufficient positioning accuracy, the location data reported by the device may be far from its actual location, which may cause the server to generate missed alarms, false alarms, or delayed alarms. Additionally, if the device uploads location data at a large time interval (e.g., every 30 minutes), the accuracy rate of electronic fence alarms will also be reduced. Considering that increasing positioning frequency usually leads to higher power consumption, it is necessary to comprehensively consider the actual usage scenarios of the wearer and the device’s battery capacity to set an appropriate positioning frequency.

Moreover, when the device is in a building, tunnel, valley, mine, or narrow street between high-rise buildings, GPS signals may be blocked, causing positioning failure. If the positioning accuracy obtained through Wi-Fi positioning is also insufficient in such cases, Bluetooth beacons can be considered for auxiliary positioning.

For more details pls find the training page of How Geo fence work.

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If you wish to purchase a sample to test this feature, you can visit Amazon
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