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Surveying question

  • 01-08-2008 10:07pm
    #1
    eugenedoc1
    Registered Users Posts: 55 ✭✭


    when using an edm to find the boundries of a site can the points taken be altered to show a different reading to whats actually on the ground.?
    i suppose what im trying to say is an edm only as good as the person using it?


Comments

  • #2
    Jimbo
    Closed Accounts Posts: 2,379 ✭✭✭Jimbo


    Any instrument is only as good as the person using it. Are you afraid the readings will be purposely changed?


  • #3
    eugenedoc1
    Registered Users Posts: 55 ✭✭eugenedoc1


    jimbo78 wrote: »
    Any instrument is only as good as the person using it. Are you afraid the readings will be purposely changed?

    Yeah jimbo. Using an edm by someone to prove that the boundries that are on the ground do not represent what is on the maps by ignoring an existing boundry and manipulating the results as it were.
    Is an edm foolproof.


  • #4
    holdfast
    Registered Users, Registered Users 2 Posts: 1,152 ✭✭✭holdfast


    yes they can be changed and moved in cad. but the raw data in the edm will remain constant in line with the co ordinate system used. ie all points will be the same distance apart no matter what.

    if you are worried that someone is trying to move the points, get a 6" ordanance survey map agree two know points both on the map and on the ground. survey them and then survey from there to the points in disput and ask them to overlay the points on the map in CAD. no point should be moved independent of each other so if he moves one he moves them all. so if the points are over the known points and the other points are where you think they are you are right. or else get somone to do this for you if you are worried it will be worht the money and they will set you straight. hope that helps


  • #5
    eugenedoc1
    Registered Users Posts: 55 ✭✭eugenedoc1


    [hope that helps[/QUOTE]

    Just the info i was looking for Thank you


  • #6
    Sundy
    Registered Users, Registered Users 2 Posts: 1,512 ✭✭✭Sundy


    Just be aware that the 6" map contains errors and a ground survey is unlikely to overlay perfectly.

    Also ask where he was surveying as the boundry. Was it the middle of the hedge or one side etc.
    Hope you get it sorted ok, boundry disputes can be messy


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  • #7
    eugenedoc1
    Registered Users Posts: 55 ✭✭eugenedoc1


    turns out after a site meeting by the relevent experts that the guys maps were totally out. He was speechless
    We came to a good compromise anyhow
    Just goes to show, you cant trust one!!


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