Inaccurate GPS leading to unreliable data
I've been having many activities that the GPS is off and after doing an interval training i couldn't believe the average pace it gave, so i looked at the route it tracked me. In the image below you can see that not once, the path that i ran was followed (the square road), making the entire run significantly shorter and subsequently giving a lower pace.
Now this wouldn't be a problem if this happened once or twice, but it often happens on various tracks. Am i the only one with this problem? I.e. GPS being significantly of track, leading to unreliable data?