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OFFSET ON AN ANGULAR LINE(DOWNLINE)

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(@retired69)
Posts: 547
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I'm doing a job and I'm attempting to show distances to back pins relative to the angled line going back.

Normally I show offset distances as normal, but the information for this job will be more understandable if I actually show the distances relative to the less than 90 degree offset.

example*****

offsets from base line(normal) are 500.00', 600.00' and 750.00'

BUT

the angular offsets are 500.35' 600.37' and 750.45'

example over*****

I've got it all done and all . . . but I forget what the term is for an angled offset(as opposed to being normal to the base line).

This is the first time in 40 years that I've needed this term, so be kind.

 
Posted : February 23, 2011 10:19 am
(@martin-f)
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If not perpendicular, do you have (or show) the angles?
Aren't they just radials, then? Maybe i misunderstand.

 
Posted : February 23, 2011 12:45 pm
(@a-harris)
Posts: 8761
 

Typical route plans reference R/W monuments and structures by offset from centerline station. and structures.

Boundaries are referenced with intersecting centerline station and a bearing and distance to corner monument.

 
Posted : February 23, 2011 1:38 pm
(@retired69)
Posts: 547
Registered
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Maybe I can explain . . .

Imagine a trapezoid with an "array" of what should be evenly-spaced pins within.

Even though the lines are parallel to their opposites, they aren't perpendicular to their adjacents(the array is skewed to agree with the boundaries)

Since the dimensions are called out for on the boundaries, I want to all call the pins within, in the same method.

SO a pin which is 500 feet offset to the road(say), that my report would say it's 500.50 feet along the skew.

If the spacing were to be 100.00 feet, interior pins would be at 200.50, 400.50 or 100.50 feet if they're placed correctly.

I want the customer to recognize the relations hip from the road in reference to the sidelines . . . not as perpendicular distance from the road.

I know there's a term for this . . . there should be a term for this . . . but I don't know the term for this or if there is a term for this.

If there is a term for this, I'd like to know. If there is no term for this I wonder how I can state what I'm trying to show without getting into a lot of extra explainations of what I'm trying to show, on the map?

. . . hmmm

 
Posted : February 23, 2011 2:12 pm
(@a-harris)
Posts: 8761
 

Post an example because most of the time looking at a sketch or drawing is much better than the words that are being used to explain what we are looking at.

 
Posted : February 23, 2011 3:14 pm