Hey Andy, we use an R10 and an S6 and typically do an integrated survey, which allows you to get the cm accuracy when the GPS satellite signal is no good, it will automatically switch between the total station
and the RTK GPS depending on what signal is better. It’s a great setup because you use the RTK GPS to get control for the robotic total station and can be run by one person. We have mapped all of our campus infrastructure in this manner.
Samuel Lingeman ‘00, GISP
CAD/DMS/GIS Administrator
Campus Dig Safe Coordinator
Facilities-Campus Planning
22 Colovos Rd
Durham, NH 03824
43° 8'10.65"N 70°56'20.23"W
From: Northeast Arc Users Group [mailto:[log in to unmask]]
On Behalf Of Andy Smith-Petersen
Sent: Tuesday, February 23, 2016 12:31 PM
To: [log in to unmask]
Subject: GPS Strategy for Difficult Environments
Friends,
We have a goal of shooting 50,000+ services and countless other bits of infrastructure with cm-level accuracy. Our Trimble R8 units normally work well for this task if satellite visibility is good. But in tree cover and urban canyons, or
on difficult-to-occupy targets, fixes are difficult and even the estimates of error can be off.
What GPS technology or strategy/ies should we be looking at as part of our work process to achieve this goal? What’s worked for you (or tried and failed)?
Especially interested in hearing from other utilities on this topic.
Thanks,
Andy
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Andy Smith-Petersen
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