General GPS Lesson – Exploring the Accuracy of Recreational Grade GPS Units
|Garmin GPSmap 60cx||Basic||Find, Map, Compass|
Summary: GPS accuracy and precision is always a topic of interest. This exercise is designed to demonstrate the level of accuracy and precision you can expect with recreational grade units.
Discussion: A general assumption with GPS units is that they can lead you to the exact location of a place, or that you can mark something with precise location coordinates. It’s important to understand the limitations of recreational grade GPS units. Recreational grade GPS units have a traditional accuracy of between 2-5 meters in general.
Instructor Set Up Select a location outside and place a marker such as a flag or other visual item at the location. Record the coordinate location with your unit.
Learning Points Accuracy is the degree in which you were correct. If all of your marks were in the proximity around your instructor's, then you have a high level of accuracy.
Precision is the ability to reproduce findings over and over. If all your marks were in the same spot and not spread all around your instructor's, then you have a high level of precision.