AutoCAD Civil 3D General

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Posts: 336
Registered: ‎06-06-2010
Message 11 of 12 (367 Views)

Re: Bringing points in via a .RAW file?

03-15-2012 07:32 AM in reply to: IanMcClain

None at all taken, Ian - I do try to offer best practices most of the time, but this one seemed extremely specific :smileyhappy:


Would you care to indulge me and satisfy my curiosity? I'm interested in what you think the survey database should/would do with RTK GPS vector data. From my early days working with GPS data (back in the mid-90's) I know the GPS-specific software (Leica, Javad (now TopCON), and a few others we used) just spit us out a point file to be used in Land Desktop. We could have gone to FBK for auto-linework, but the vector and baseline data was not something we needed to do anything with in the CAD program - all adjustments (if needed) were done in "other" software - much like laser scanning post-processing software is today. In a perfect world, what do you think Civil 3D should do with RTK data (not points and descriptions) assuming that you could get the same info spit out from every manufacturer of survey equipment?

Jason Hickey
Premium Services Specialist
Autodesk, Inc.

Valued Mentor
Posts: 437
Registered: ‎09-29-2008
Message 12 of 12 (363 Views)

Re: Bringing points in via a .RAW file?

03-15-2012 08:01 AM in reply to: Jason.Hickey



What I'd like to see is the RTK vectors represented in some way that establishes them as a relative measurement between the base receiver and the rover receiver, with allowance for a base height and receiver height. It could probably be done now with the current .fbk format if the converting software would reduce the data to an azimuth and slope distance from base to rover. This should allow for calibration/localization parameters, which as far as I can tell is simply a rotation, translation and scale applied to one base/rover setup.


I like to think of my RTK as a total station with x-ray vision that can see line of sight through obstructions. That's a gross misleading simplification, but that's how the data ends up. If you bring in .raw files with RTK into Trimble Business Center, you'll see vectors coming out of the base connecting to the rover observation just like a conventional total station/rod setup.


Like I said, it may be possible with .fbk as is, and it's really up to the equipment/field software manufacturers to change their output. I'm hoping you guys (Autodesk) have some kind of leverage or dialogue with those guys.


Anyway, thanks for indulging me.

-Ian McClain
(running C3D 2012 sp4, Win7 64bit, 8GB)

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