Civil3D & Us Survey Feet vs Feet
At the company I am with currently we have been using the “Feet” units in our Civil3D drawings despite our data collectors using “US Survey Feet”.
C3D has made available the use of “US Survey Feet” as a unit since 2017 but we just never bothered to look into changing our drawing use that unit.
Despite overlooking this issue, I consider myself to be pretty savvy with both C3D & GIS Data (and maybe slightly less so with coordinate systems and projections). Whenever discovered I will always chase down discrepancies of hundredths. Yet I have never noticed any problems with our current configuration (C3D = “Feet”, Data Collector = “US Survey Feet”).
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My current dilemma is to decide if I should change the units in all future C3D drawings to “US Survey Feet” knowing that it may (or may not?) have some repercussions.
A. Does it pay to change all new projects to “US Survey Feet” if the new coordinate systems released in 2022 (maybe delayed a year or two now?) will not be using “US Survey Feet”. My thinking here is that we have not used “US Survey Feet” in our drawings for 4 years now with no know problems so why change now only to change back to “Feet” again.
B. What issues may I encounter with copy and paste from old drawing with units set to “Feet”? I often use copy and Paste to Original Coordinates to move objects from one drawing to another.
C. Why have I not noticed any issues? Seems like there should have been issues encountered somewhere unless my particular workflow has miraculously steered clear of them. Particularly with some of my county wide drawings where I have coordinates for all of our shots on section corners.
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I know there is a INSUNITS system variable in C3D that may eliminate all of my concerns – or not??? I am currently trying to look into this system variable but just need to figure out a good test scenario.
Thanks in advance. Just thought I would throw this question out there before I started scratching my head too hard.
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