Witness Post

[+kcseagull]

What is a witness post and what is a mark?

 

Hate to be stupid, but.

 

Kcseagull

[+BlueDeuce]

A witness post is usually a posted sign showing that there is a benchmark nearby.

 

Check here for what is a benchmark. Too much detail for me to type here.

[+CYBret]

A "mark" is a benchmark. You can find out more about them here.

 

A witness post is simply a post that "bears witness" that a benchmark is nearby. They are used as reference points for where a benchmark is located.

 

Here's a picture I took of both a benchmark and a witness post.

 

 

Bret

[Dale_Lynn]

A witness post is a usually some sort of metal or wood maybe even plastic post placed in ground next to a Benchmark...... A bench mark is usually something like a round brass "marker" with unique data stamped into it and is usually found in a concrete base or cemented into a rock -"USGS Benchmarks"... A witness post can also be associated with something as simple as a piece of pipe or steep rod driven into ground to designate a property boundary or some other designated location...

 

Here is a interesting description of " witness post"...

 

http://www.websters-online-dictionary.org/...on/witness+post

 

Dale

[+NickL]

Some marks are for things other than USGS, though they are some of the most common that you will find. While hiking to/searching for the Project APE :Mission 12: Blind Canal cache I found this mark:

 

 

The dot was actually set after the marker was placed. It marks the "exact" edge of the canal properity.

[+kcseagull]

Thanks to all of you for your reply and help.

 

Kcseagull