GIS5935 M1.1 Lab

Exploring GPS Data Accuracy and Precision: A Brief Analysis




Numerical Results for Horizontal Accuracy and Precision

Horizontal Accuracy: 3.24 meters
Horizontal Precision (68%): 4.47 meters

Understanding Horizontal Accuracy and Precision

Horizontal Accuracy: This is the measure of how close the average of the collected waypoints is to the true location (not shown in the map). In this case, the average waypoint is 3.24 meters away from the true reference point, indicating reasonably accurate measurements.

Horizontal Precision: Precision refers to the spread or variability of the GPS points around the average. Here, a precision of 4.47 meters suggests that the individual measurements are spread out, meaning that while the average position is accurate, the data points themselves are not consistent.

This difference between accuracy and precision highlights the GPS unit's performance: it provides a generally accurate estimate of the location, but has low precision with variability in individual readings.

 

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