Weeding and Supplementing Factors with Survey Figures Building a Surface
You need to make the mid-ordinate distance less than 1 not greater. It's like a percentage. Change it to something like 0.2 and see what happens.
Rick Jackson
Survey CAD Technician VI
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@rl_jackson, the OP is trying to get rid of the intermediate points on curves, not add to them. And it not a percentage. the mid-ordinate is the distance from a point on the arc to the midpoint of a chord drawn between two points on the curve. So the smaller the mmid-ordinate distance, the shorter that chord which yields more points.
My bad, never heard of doing that though. Usually its the other way around, and based on the points in the drawing, I would guess that those are the shots that make up the curves since it's has multiple compound curves going on. which would not get removed by the mid-ordinate factor.
Rick Jackson
Survey CAD Technician VI
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After watching the video several times, there doesn't see to be enough in the drawing to construct the surface.
Questions:
Did the field crew shot pavement points between the islands if not you'll most likely need them as it is sloping from one island to the other.
Is the curb standard 6" Verticle Curb, if so your missing a line for the vertical face (you only have two breaklines, there should be 3 in the case of vertical curb, I usually handle all curb by shooting either the flow line or back of curb and then using Horizontial and Vertical offsets in the figure codes to handle the breaks.
Your point group is including the curb shots correct. If so you should not be doing this, this may be causing it to ignore the breaklines entirely. For a site like you have the only shots that should be in a suface group are the ones that are not a breakline. i.e. pavement and ground shots, and maybe a few others.
Rick Jackson
Survey CAD Technician VI
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Unfortunately I don't have version 17 installed.
If your group contains the curb points, don't include them in the group
If your group contains the curb points, don't include them in the group
Rick Jackson
Survey CAD Technician VI
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As we've noted previously, it appears that the mid-ordinate distance for survey figures is hard coded into C3D. If you truly do not want the added interpolated points along the arcs, you can edit the surface & Delete the points you don't want...just be sure the Surface Style has Points set to display. Depending on how many of these you don't want to be used, it may take a little bit of time but at least you will get what you were looking for.
@Anonymous, I've added this to the Civil 3D Ideas. Please go vote for it so it may get added in the future. Add a comment if you'd like as well.
I don't have time right now to test this out myself but it sounds like this is only an issue when using survey figures as breaklines. Correct?
You could explode them then reimport them as FEATURELINES. Now that they're featurelines, use them for your breaklines.
Just a thought for a possible work-around.
Don Ireland
Engineering Design Technician
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