Monument Pins Overview


Monument Pins

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Mount Commonly Used
Stability
Cost
Install Time
Labor
Substrate
Site Impact
campaign GPS/GNSS antenna mount

med-high

$15-50

<1 hr

1
BR, R

low

 
Danish geodetic marker near Kangerlussuaq, Greenland (left); simple stainless steel pin at site DOIW in Afar, Ethiopia (right).

Pros

Cons

Design and Construction

There are a variety of marker designs. In general, markers consist of a post with a 1 mm dimple or intersecting crosshairs on top. The marker most commonly used by UNAVCO is the dimpled monument pin, or "Bevis pin." The Bevis pin is a 6-inch long, 1/2-inch diameter stainless steel pin machined with notches on the sides to prohibit rotation and a 1 mm dimple on the top. Machine and installation instructions are given below.

Bevis pin machining instructions (.pdf)

Bevis pin installation instructions (.pdf)

Approximate Cost

$15-50; varies depending on marker design.

Materials

Tools

Mount Commonly Used

         

Many mounts can be used with a monument pin, including the Tech 2000 mast, UNAVCO fixed-height spike mount, standard, short, or fixed-height tripod, or bipod. See the UNAVCO Resources: GNSS Antenna Mounts page.


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Article ID: 640
Created On: Fri, Feb 19, 2010 at 6:26 PM
Last Updated On: Fri, Feb 19, 2010 at 6:26 PM
Authored by: Beth Bartel [bartel@unavco.org]

Online URL: https://kb.unavco.org/kb/article/monument-pins-overview-640.html