# station

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I look at the detail sheet for a benchmark, and it talks about the "station". I guess it is different from the benchmark itself. What is a station?

The "Station is the Mark",there are usually more,The Azimuth,the references,1,2,3,4 is as many as I have seen,and only recovered 3 references associated with the "Station"

There are several kinds of stations,

Triangulation

traverse

transit

gaging

mining

plus

and reference.

WHEN ALL ELSE FAILS

*GEOTRYAGAIN*

TAKE PRIDE IN AMERICA

1803-2003

"LOUSIANA PURCHASE"

Arkansas Missouri Geocachrs Association

http://www.ARK-MOGeocachersAssociatoin@msnusers.com

http://groups.yahoo.com/group/Ark-Mo-Geocachers

I may be entirely wrong about this, and surveyors and the NGS may have totally different ideas than I do, but this is an issue I've been wrestling with for some time. The way I've been dealing with it is to try to define the terms more clearly in my mind.

I see a distinction between what is meant by "station" and "mark." In my view the station is the mathematical equivalent of a "point." A point is an abstract entity that defines a unique one-dimensional location in three-dimensional space. A point is infinitely small and is impossible to see and even difficult to imagine, but it can be approximated by using a physical entity—say, for example, a point in the exact center of a sheet of paper can be very closely approximated by placing a dot made by the tip of a pencil at the center as measured with a ruler. That dot (which I think of as the "mark") for all practical purposes represents the point (the "station"). Therefore, I am equating the point to the "station," and the dot to the "mark" (or "landmark").

Furthermore, if you erase the dot the original point still exists in theory, even though there is nothing on the paper to represent it any longer. Hence, if a station mark (bronze disk or landmark) is missing, disturbed, or destroyed, the station itself will continue to exist. In other words, we can know it's coordinates but if you go there you won't see anything to represent it physically. The condition of the mark can therefore be described as either existing, in poor condition (something is there that a surveyor can still use), or completely gone. In essence you have "found" (positively identified) the station, and observed the "condition" of the mark which should be there to represent the station.

Perhaps a surveyor or a mathematician can help explain this much better.

Cheers ...

~Rich in NEPA~

--- You might own the cache, but geocaching.com owns you. ---

my 2cents

Station refers to horizontal control.

Horizontal Control Station

CORS - Continuously Operating Reference Station

Triangulation Station

The station is the position, the mark is the object of the position (survey disk etc). At least that is the way I interperate it.

Often these are used interchangeably.

Mike

Survey Tech (Retired)

You are thinking along the lines of the the Theories of Aristotle and Ptolemy,another Archimedes,these were great Thinkers as well their writings might entrigue u if you haven;t read them.

It is much the explanation you give a "Point is that which has a beginning and............."

See: Ptolemy's Almagest

See: Aristotle's, 1st Book on Physics

WHEN ALL ELSE FAILS

*GEOTRYAGAIN*

TAKE PRIDE IN AMERICA

1803-2003

"LOUSIANA PURCHASE"

Arkansas Missouri Geocachrs Association

[This message was edited by GEO*Trailblazer 1 on October 09, 2003 at 07:03 PM.]

BUT then of course, when they are describing an elevation BENCHMARK along a railroad, station may mean the (long gone) RR station in a town? In JD0474 it is spelled out, JC1034 and KD0086 however leave it rather undefined.

Everybody loves benchmarks more!

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