Information here is useful in understanding the limitations of GPS accuracy, as well as looking at some of the ways to improve it (I say some as I didn&#x27;t see GLONASS mentioned).<p><a href="http:&#x2F;&#x2F;www.gps.gov&#x2F;systems&#x2F;gps&#x2F;performance&#x2F;accuracy&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.gps.gov&#x2F;systems&#x2F;gps&#x2F;performance&#x2F;accuracy&#x2F;</a>