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Recent Articles By John Stenmark
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John Stenmark is a writer and consultant working in the
geospatial, AEC and associated industries. He has more than
25 years of experience in applying advanced technology to
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Fitzpatrick looks at the project as a very precise traverse. While it has a number of similar aspects to
aboveground surveying, the costs and limited access demand constant attention to detail. He's designed
the work keeping in mind the distance and geometry, and is keenly tuned in to the capabilities of his
instruments and procedures. Everything is designed to reduce or trap blunders, and all equipment is eld
calibrated once per week. The Towill team has developed specic procedures to handle the TBM and its
guidance system, and Whitman notes that Towill went so far as to design specialized brackets for the
instrument mounts.
But even with all the checks and precision, it's possible to lose sleep over the project. "I trust my math,
adjustments and measurements--it's the best you can do," Fitzpatrick says. "You've got to have a certain
amount of condence. You can't be a cowboy, but you've got to have a little bit of that risk-taking gene in
you. It's not for every surveyor."
For more information about Towill Inc., visit www.towill.com.
Additional details about Trimble equipment and software can be found at www.trimble.com.