Dobs are NOT about high magnification. They're for looking at large very dim objects (galaxy, globular clusters, etc.). Those are at relatively low mag that doesn't require a lot of bumping of the scope to track an object.

This kind of problem is solved by something called a suitability analysis.... and its been in textbooks teaching GIS since at least 2005.

For surveyors, GPS basestations + roamers used for surveying are in the $10,000+ dollar range, and you don't replace them every few years.There's always going to be significant amounts of "old" (and old in terms of the 2-year churn for mobile phones) GPS equipment being used by the folks who need extremely high levels of accuracy.

You wanna make that scan result accurate?

Replace the word "Mozilla" with "Internet Explorer" and the warning will be pretty damn accurate.