What is the reference for fixed positioning?

Fixed positioning usually refers to four aspects: "geographical coordinate system", "infrastructure markers", "artificially set positioning points" and "sensor measurement data": 1. By determining the longitude and dimensions, the position of the point can be accurately identified; 2. By identifying and measuring the position and distance of the landmark, the position of other objects can be determined; 3. By setting some known positions in advance as reference relative relationships, The position of other locations can be inferred; 4. Use various sensor measurement data for reference.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Fixed positioning usually refers to the following aspects:

1. Geographic coordinate system:

   An important reference used in fixed positioning is the geographical coordinate system, such as Latitude and longitude coordinate system. By determining the longitude and latitude of a point, the location of that point can be accurately identified.

2. Infrastructure landmarks:

   In urban environments, fixed positioning can refer to infrastructure landmarks, such as buildings, roads, bridges, etc. By identifying and measuring the location and distance of these landmarks, the location of other objects can be determined.

3. Manually set anchor points:

   In some specific scenarios, you can set some anchor points with known positions in advance as a reference. By relative relationships to these anchor points, the location of other locations can be inferred.

4. Sensor measurement data:

   Fixed positioning can also use various sensor measurement data for reference. For example, by using sensors such as accelerometers, gyroscopes, and magnetometers, the position of the device relative to a starting point can be deduced.

It should be noted that different fixed positioning technologies may use different reference methods. For example, GPS positioning mainly relies on satellite signals, while base station positioning relies on base station information of mobile communication networks. Therefore, when selecting fixed positioning technology, it is necessary to determine the appropriate reference method based on specific application scenarios and needs.

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