My Distances Are Not Correct!!


This post is definitely an oldie, but a goodie.  I had a customer call a few days ago stating that his distance from a line perpendicular to another line is not correct.  This is common when working with points.

Let take for instance that we have two lines running parallel to each other.  Let’s look at the two lines that we are discussing…

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If I do a distance between the two lines, I get a distance of 10’ as shown…

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Now let’s pretend that we had points in the drawing and we drew these two lines from point to point (node to node).  See image below:

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Now if I do a distance, I get 10.0125.

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As you well know, in the Civil industry, precision is a must.  So, when working with these conditions there are few different ways in getting the precise distance in 2D.

One is to use the FLATTEN command.  This will set all the linework that is selected to a 0=Z value.

Another way is to go to the properties of the line and change the Z value to a 0.

Well, suppose you didn’t want to alter the line, and you wanted the line to maintain the Z values, BUT you wanted to get the 2D dimension between the two?  What do you do in this case?

There is a system variable for this called OSNAPZ.  Type this in the command line and set the value to 1.  Now do your distance.  It now reflects the 2D value as shown…

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Have a great Halloween!!


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