Boundary work

topic posted Mon, March 21, 2005 - 6:20 PM by  Unsubscribed
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Have you done any boundary surveying? In which state?
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  • Re: Boundary work

    Tue, March 22, 2005 - 6:54 AM
    Not sure what that is, is it a GPS task?
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      Re: Boundary work

      Tue, March 22, 2005 - 6:56 AM
      What is your background?
      • Re: Boundary work

        Tue, March 22, 2005 - 6:59 AM
        I have some experience running a total station, transit etc, mostly in large-scale settings, i.e. archaeological sites. I haven't got much GPS experience, but I know how they work.
        • Re: Boundary work

          Sat, April 9, 2005 - 1:06 PM
          Okay, I'm a dummie, but would you mind telling me what "boundary work" is? I joined this tribe to learn more about surveying?
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            Re: Boundary work

            Sun, April 10, 2005 - 10:16 PM
            Sure! I apologize for my slacking off!

            Boundary surveying means locating property corners (usually iron pipes, iron rods, brass disks, etc. buried a few inches underground) and measuring the distances and directions between them to see if the measurements match what is on the deed to the property. Sounds easy, but the reason surveyors are licensed and registered by the state is that there is a need for professional judgment to find where the boundary is when there is a question.

            For example, if you live in a housing tract, the property corners are pretty straightforward, and generally there is not much question on where your boundary lies. You may have noticed wooden stakes with pink or orange flagging in a new housing development; that is where pipes or rods where set for property corners. But if you live out in the country, and have a large, irregularly sized piece of land, the complexity (and price) of doing a survey of the property multiplies. It also calls for a professional decision if there is a conflict with the deed or one of the neighbors. That's the short version.

            In addition, part of performing a survey is drawing the "plat", or map of the tract showing the measurements you found in the field, and how the property is situated in relation to its neighbors. I do the drafting in AutoCAD now, and in Texas, I sign and stamp surveys, but 15 years ago, they were all hand drawn.

            These days, I do both small lot surveys and large acreage surveys up in the mountains or way out in the desert. I enjoy the variety of work, and I love hiking up into the hills looking for old property corners, some of which are over a hundred years old.

            Next lesson: total stations or GPS?
            • Re: Boundary work

              Mon, April 11, 2005 - 1:38 PM
              Interesting! Thanks for the information. Archaeologists do this kind of work too (broadly) if we have locations of known historical features mapped out, we often locate the same features on the ground and see how they match the historical maps. In the case of Ft. Vancouver, WA, it turns out the older maps were off, sometimes by more than a meter.

              I've done a lot of work on federal land, and I always get a kick out of finding brass-caps and bench marks.

              GPS or total station? I suppose it depends on the map. My experience is that GPS has a lot of error built in, but I seem to remember that this is intentional scrambling by the DOD, which has been turned off recently? Anyhow, I would be interested to know what kind of resolution current GPS systems offer and how that compares to total station resolution.
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                Re: Boundary work

                Wed, April 20, 2005 - 4:33 PM
                This past week, I've been doing a lot of GPS surveying. We have had several clients with large tracts (40 acres, 80 acres, etc.) that needed to be surveyed, and with such a large area to cover, it makes more sense to do them with GPS.

                In a nutshell, GPS uses signals from satellites orbiting 11,000 km in space to measure the distances between receivers. In a "static" survey, a receiver sits on a monument for typically 20-45 minutes and the common data is processed into "vectors" with an exact bearing and distance. So yesterday, we occupied the section corners (1 mile apart) and each of the quarter section corners for 30 minutes. After data processing, we get precise measurements. Sorry, gotta go, more later!

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