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what are those official looking ppl standing on street corners with a tripod?

I know they're surveying for a project, but I've never stopped to ask what exactly they're measuring. Are they checking if the ground is level or something?
 
Yeah, it's got to do with the elevation of one point to the next...accounting for water drainage and other math-problem type stuff.
 
I know they're surveying for a project, but I've never stopped to ask what exactly they're measuring. Are they checking if the ground is level or something?


Probably checking for several things, depending on what is needed:

easements
property lines
location for structural support
area topography

I used a surveyor couple years back when I put up a new fence. He checked for property lines. He let me look in the camera to see what he was seeing. Let me see that two telephone poles "on the property line" were actually in my property. Standing and looking, you couldn't tell the difference, but with his camera and stake at the other corner, you could definitely tell.
 
Surveyors find errors all the time, so they have to re-check everything before a major project. Assumptions that existing data are accurate = fail.
 
You should have pulled the car over and asked silly. But make sure you're going at least 60mph before you jam on the brakes so to create enough tension before you pop the question.
 
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You should of pulled the car over and asked silly. But make sure you're going at least 60mph before you jam on the brakes so to create enough tension before you pop the question.

Using "of" instead of "have" looks sillier.
 
it's called a transit level. you set it up at a point, then use a tall measuring stick to level everything up.
 
If they don't look like they have any lenses and are pretty small, they may be GPS surveying receivers/whatevers. Turns out they can be pretty precise.
 
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