Old question I know, but NGS web site has it both ways and I can't remember which is right.
The way I heard it, a vertical control point is a Bench Mark. Benchmark has various looser interpretations.
Bill93's right on (as always from what I've seen).
A benchmark is a point of reference by which something can be measured. In surveying, a "bench mark" (two words) is a post or other permanent mark established at a known elevation that is used as the basis for measuring the elevation of other topographical points.
I guess a "bench mark" can be the "benchmark" for a particular project.
The way I remember it:
You clear brush to a benchmark with a brush ax while eating a donut then break for lunch at a barbecue restaurant
You clear brush to a bench mark with a brush axe while eating a doughnut then break for lunch at a barbeque restaurant
> The way I remember it:
>
> You clear brush to a benchmark with a brush ax while eating a donut then break for lunch at a barbecue restaurant
>
> You clear brush to a bench mark with a brush axe while eating a doughnut then break for lunch at a barbeque restaurant
LOL Thanks guys, that's what I was thinking.
Vertical Control Point.
😀
I always thought they were synonymous, but apparently there is a subtle difference based on the comments. Thanks for the info! 🙂
Vertical Reference Point lol
For me, this is the definitive answer:
I love this forum..read every post every day.
Kudos to admins and guys that are willing to share their knowledge and experiences!!
Two words - Bench Mark. Look at any old geodetic monument and you will see it as two words. The modern geocaching activity has attributed a lot to having it one word instead of its proper two word spelling.