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john-hamilton
john-hamilton
@john-hamilton
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Joined: September 13, 2010 4:25 am
Last seen: January 21, 2025 6:58 am
Topics: 399 / Replies: 2952
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RE: 8 mile level loop with 2 different rods

I do not use TBC to process level data (or total station data or RTK for that matter, only for post processed static GNSS). By the way, dini comes f...

3 weeks ago
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RE: Leveling staff

I run a lot of levels. Multi-section rods are OK if running in a flat area. Once you start mixing high rod/low rod, errors will accumulate. I have thr...

4 weeks ago
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RE: NGS data sheets

So if it is just an azimuth mark it does not have a position. The "box score" shown only lists an azimuth to it, no distance, so no position was compu...

2 months ago
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RE: Going to Trimble Dimensions? November 11-13?

It keeps getting larger every year. There were 7000+ attendees this year. BUT, I saw fewer people that I know than in past years. Disappointing in tha...

2 months ago
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RE: RTN Mountpoint naming

Makes sense, Jeff, thanks for that. Weird, though that the Trimble run VRSNow does not use that terminology.

3 months ago
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Replies: 3
Views: 117
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RE: GNSS RTK Accuracy

I should add a few comments about the project I mentioned. The purpose of the RTK was for horizontal only, since we ran levels for the vertical. I did...

3 months ago
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RE: Starnet license type?

Yes, the regular license level uses a USB dongle

3 months ago
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RE: GNSS RTK Accuracy

I do two kinds of real time surveys...with my own local base and also using a VRS. When I setup a local base, and keep the distances under 5 km or so,...

3 months ago
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RE: Transferring control from ground surface to a 150' deep tunnel

Assuming the shaft is more than 3' diameter: Wild ZNL Zenith Plummet at the bottom. Plexiglass panel at the top. Plumb underneath a mark on the plexi...

3 months ago
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RE: Data Management

A related question...point numbering. I setup my workflow to have unique point identifiers for all points except topo ground shots. I use the job numb...

3 months ago
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RE: Going to Trimble Dimensions? November 11-13?

I will be there. I have been to all going back to the first several ones over in coastal California before they moved it to Las Vegas. I sometimes pre...

3 months ago
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RE: NATRF2022

Thanks for the update, Jeff. I have mentioned to some federal clients that they might want to consider doing upcoming mapping in the new datums, but n...

4 months ago
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RE: Detail Surveying and Creating GNSS Control

How are you getting the "<10 cm absolute position"?

4 months ago
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RE: CONVERTING GNS STATIC FILE FORMAT TO RINEX

The manufacturer should be able to provide a conversion program. Usually free from their website

4 months ago
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RE: Bridge Deformation Study

a few ago there was a fire under a major bridge here in Pittsburgh (City of Bridges). The newspaper quoted the surveyor monitoring the bridge that it ...

4 months ago
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4 months ago
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RE: Bridge Deformation Study

Can't be done. Ridiculous Spec if that is the accracy requested

4 months ago
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Replies: 1
Views: 139
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