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john-hamilton
john-hamilton
@john-hamilton
Member P&R, Founder
Joined: September 13, 2010 5:25 am
Last seen: September 16, 2026 3:38 pm
Topics: 409 / Replies: 3051
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RE: Don't set a PK Nail in Grimes County, Texas

I do more photo control than most people, probably a few thousand points a year. I do not set anything like a nail or spike when painting a target. An...

9 years ago
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RE: Out of town surveyor

I had a survey to do last week where I flew in to a town right in the middle of the south portion of the job. Drove 2500 miles in 5 days doing photo c...

9 years ago
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RE: Some Railroad Surveying

I didn't know you had other lines outside of the Allegheny River valley.

9 years ago
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RE: T02 file missing

Not sure about the model 4, but on older models the area with the directory listings of the files would get full, even though the files were deleted. ...

9 years ago
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RE: Some Railroad Surveying

It works differently of course when you work FOR the railroad. Plus, those lines are not used much, and slow speed. But it would be nice to never get ...

9 years ago
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RE: Some Railroad Surveying

Nice pics of familiar locales...

9 years ago
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RE: 14 hours and 2 minutes

They don't like the cold...

9 years ago
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RE: 14 hours and 2 minutes

We got to the border crossing near Chicken (doing survey work for the US government), there was no one there at either side (US or Canada), closed for...

9 years ago
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RE: 14 hours and 2 minutes

Only time I was in AK was in late October, made it as far north as Chicken. Got dark early!

9 years ago
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RE: 14 hours and 2 minutes

I was working last week in a place with sunrise at 05:30 and sunset at 20:39. So 15h 07m of daylight. Not as extreme as Alaska, but still a long day. ...

9 years ago
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Replies: 1
Views: 829
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RE: A brief synopsis of the NGS Geospatial Summit

Actually, some states are expressing a desire to go to one single zone, which much higher scale factors. Better for statewide GIS, not so good for sur...

9 years ago
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RE: Question for Trimble users

The help file in access says that it is a reduction to the ellipsoid. I think they throw in the "sea-level" phrase because that is what people used to...

9 years ago
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RE: Question for Trimble users

First of all, since elevation only has one "l", maybe that means ellipsoid, which would be the correct surface rather than "sea-level" (or orthometric...

9 years ago
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RE: A brief synopsis of the NGS Geospatial Summit

Shawn Billings, post: 425558, member: 6521 wrote: Glad to hear the new reference frame will be at a fixed epoch. I had heard as recently as last week ...

9 years ago
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9 years ago
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RE: A brief synopsis of the NGS Geospatial Summit

GeeOddMike, post: 425525, member: 677 wrote: With respect to the new vertical datum, as the designation GEOID### is used for hybrid models, won't it b...

9 years ago
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RE: A brief synopsis of the NGS Geospatial Summit

Yes, they did say that OPUS-Projects will have leveling, traverse, etc tabs. Not sure how exactly that will reside in to DB if they are not adjusting ...

9 years ago
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RE: A brief synopsis of the NGS Geospatial Summit

James Fleming, post: 425476, member: 136 wrote: Thanks...that saved me 12 unbillable hours and having to deal with the mass transit crap-shoot that is...

9 years ago
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