Capturing GPS Accuracy
Finding the ‘Right’ GPS Solution.
The iFormBuilder platform allows a user to capture location data using a device. While capturing the location data, it is important to understand how accurate the GPS coordinates are.
Below, you will find information on GPS device accuracy and GPS products on device GPS, Bluetooth “Consumer Grade” GPS and High Accuracy “Professional Grade” GPS systems. These products are just examples. There are many other products that meet the criteria.
Device GPS Accuracy
- In open sky 90% of the time, the integrated device GPS captures location data within 3 meters of accuracy.
- Battery drains quickly with location services turned on.
- Canopy areas (trees) will reduce accuracy significantly.
BlueTooth "Consumer Grade" GPS Accuracy
- External GPS Receivers connect to the device via Bluetooth.
- 1-meter accuracy 70% of the time.
- 3-meter accuracy 99% of the time.
- Battery drains slower.
- Some have SBAS capabilities, which improves accuracy. Click HERE for more information on what SBAS is.
GPS Receiver with SBAS
GPS Receiver without SBAS
High accuracy "professional grade" GPS
- Connect device to an external receiver with a GPS cable.
- GPS cable can connect to many high accuracy GPS receivers.
- Captures sub-centimeter accuracy.
GPS Cable Options
*Accuracy data and images were taken from the Esri ArcGIS Resources Blog post "Smartphones, Tablets and GPS Accuracy" by Jeff Shaner.
Help other users by leaving comments and/or suggestions about GPS products in the "Comments" section below.