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  1. fredlmc

    Finding coordinates of a point using two theodolites

    Leveling of the theodilites is always important and a standard step when using a theodolite. This will affect precision of the results in this case. However, being at equal heights, I firmly believe, is of no importance at all in both the 2D and 3D scenarios. In 2D, you would be shooting the...
  2. fredlmc

    Finding coordinates of a point using two theodolites

    It absolutely is overkill. Especially with today's laser scanning equipment, range finders and all other equipment. However, if you want to scan a relatively complexe geometry, dont need too dense a point cloud and all you have is a pair of vintage T2s and time on your hands, that's the way to...
  3. fredlmc

    Finding coordinates of a point using two theodolites

    Good catch regarding the bar comment. Yes, I have put some thoughts about the levelness of the bar. Being that this is being done indoors and that the bar is set on the floor I consider it to be level enough. Thanks,
  4. fredlmc

    Finding coordinates of a point using two theodolites

    With the good help of people at Math Forums I found the solution: For everyone's benefit, here it the complete solution: A bit of trig: (Note: Angles a3 and a4 below are the complementary angles to those shown on the sketch above) X1 = l1 cos (a1) Y1 = l1 sin (a1) X2 = l2 cos (a2)...
  5. fredlmc

    Finding coordinates of a point using two theodolites

    Here is a topography problem that is currently stumping me. The problem statement simple: Given: Angles a1 to a4 (or slopes m1 to m4, same thing) Distance L Find: Distance l The real life situation is that I have two theodolites at points P0 and P3. I also have a length of steel bar with...

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