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Thread: Need help with a topo symbol

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  1. #1
    us
    Apr 2010
    Twin Cities, MN
    AT Pro
    150
    13 times

    Need help with a topo symbol

    Was wondering if anyone could help me out with this topo symbol. Not sure what it means and was hoping some pros here could throw me a bone.
    It is a map from the 30's and the same symbol appears 3 times on a large map in different spots

    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	BM X 641.jpg 
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ID:	665504  
    "Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen." ~Winston Churchill

  2. #2
    us
    Sep 2007
    New Jersey
    Whites V3i and DFX
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    Quote Originally Posted by usaftrevor87
    Was wondering if anyone could help me out with this topo symbol. Not sure what it means and was hoping some pros here could throw me a bone.
    It is a map from the 30's and the same symbol appears 3 times on a large map in different spots
    That black square indicates a house if that's what your asking.

  3. #3
    us
    Apr 2010
    Twin Cities, MN
    AT Pro
    150
    13 times
    Oh sorry; I should've specified. I meant the BM X 641
    "Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen." ~Winston Churchill

  4. #4
    us
    Apr 2010
    Twin Cities, MN
    AT Pro
    150
    13 times
    nevermind; its a Benchmark for elevation. Thanks Though
    deepskyal likes this.
    "Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen." ~Winston Churchill

  5. #5
    Charter Member
    us
    Come out from under your bed today...... DO SOMETHING!

    Jun 2008
    Yarnell,AZ and Titusville,FL
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    The "BM x 641" means there is a "bench mark tablet" there. That particular tablet is 641 feet above sea level. The best representation of a bm tablet I have ever seen is the one in the "Long Term Visitor Area" south of I 10 near Quartzsite, AZ, on US 95 If you go south into the camping area and watch to the left, you will see a small cement "monument" leaning over and on it you will see a bronze circle showing data on it. I have a pic and hope I can find it for you. The BM's are part of the survey system that occurred many years ago... and, indeed, continue today. TTC
    ONE MIND - ANY WEAPON

 

 

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