These resources are brought to you by the Cooperative Extension System and your Local Institution

Articles from our resource area experts.

Have a question? Try asking one of our Experts

Position Dilution of Precision (PDOP)

Last Updated: October 02, 2008 Related resource areas: Geospatial Technology

View as web page


A unitless figure of merit expressing the relationship between the error in user position and the error in satellite position. For most purposes and GPS receivers, PDOP values considered good for positioning are small, such as 3. Values greater than 7 are considered poor.


Have a specific question? Try asking one of our Experts

Unlike most other resources on the web, we have experts from Universities around the country ready to answer your questions.