Larry Best, post: 395050, member: 763 wrote: No, not ALL of us. There are surveyors who work under the assumption that the earth is flat. That assumpt...

John Hamilton, post: 394911, member: 640 wrote: As much as some people want to do only GPS nowadays, this sounds like a job where a total station woul...

That's a beauty, fer sure!

aliquot, post: 394619, member: 2486 wrote: Although the term averse possession is used, this is not averse possession as we think about it under state...

Gene,I am so fricking jealous!We do a major happy dance IF we can find the rotted remains of a Bearing Tree/Stump or wood post in a mound of stone!Asi...

Those are beautiful Gene, and the tranquil setting is nice too.Keep'em coming buddy.Loyal

On the subject of Mineral Survey accessories, we have yet to encounter a BO (Bearing Object) or BR (Bearing Rock) on any of the 3-4 dozen Mineral Surv...

Wow...that's a gneiss one Gene!:cool:Loyal

Nate The Surveyor, post: 393729, member: 291 wrote: Thanks Jim.It took me a bit to figure out ppm.... But after figuring it out, i liked it's brevity....

Kent McMillan, post: 393533, member: 3 wrote: I think that the answer is that in most normal urban areas the error introduced in ignoring the orthomet...

Kent McMillan, post: 393529, member: 3 wrote: Just out of curiosity, what do you think the maximum error introduced by ignoring the orthometric height...

Kent McMillan, post: 393523, member: 3 wrote: I'm trying to think of a public works project involving fluid flow over a distance of about 7 miles wher...

In fact, IF one really wants the best results, you would use the BEST gravity model available (not the NAVD88 gravity Model), and compute geopotential...

Bill93, post: 393517, member: 87 wrote: I guess it doesn't matter on this project, but for critical tolerance on fluid flow, I would think they should...

Jim Frame, post: 393505, member: 10 wrote: I know, I headed up the project that established their bluebooked heights. (I had a lot of help from Don D...

Jim Frame, post: 393500, member: 10 wrote: AI5051DK4487JS4556 You're right Jim, the ortho corrections are ZERO between these stations.On the other ha...

Jim Frame, post: 393492, member: 10 wrote: The gravity field is pretty consistent around here, so I don't think the ortho height correction is going t...

You can get a pretty good handle on the 'what-if' by using the NGS program LVL-DH (linked below) and the 3 Bench Marks mentioned in the opening post.Y...

Kent McMillan, post: 393418, member: 3 wrote: That does sound like a pretty "clean" job with digital level and Star*Lev.Maybe!Unless things have chang...