I am having a difficult time drawing a survey in 3D, mainly because hard surfaces like roads look crooked in 3D.
I usually draw in 2D and create a surface from the data points.
Is there a way to drape my 2d lines onto a surface?
Linetypes are not displayed on 3d polylines. So we draft with 2d lines until we need a 3d polyline for a profile.
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Are you using Civil 3D or some third party application? To answer your question about draping a 2D polyline would require knowing which software you are using.
In Civil 3D, importing field work generates feature lines (they do show linetypes) which are used as breaklines in combination with the points to create surfaces. I am now using Carlson, and when I process field work I have it draw both 2D polylines (used for show) and some 3D polylines for pertinent linework (for breaklines to be used in surfaces).
No matter which software you have, I suggest using more than just the points to create a surface. Having breaklines will greatly improve the quality of your surface.
I do my "paper ready" in 2d...then draw 3d break lines on a non plot layer...a little extra time, but worth the effort
I'm working in 2D so that's what I'm drawing. Somebody has a problem with that can kiss .............................
The few topo jobs I do are mainly tied to ALTA's and are not something where someone is expecting to truly expect 3D digital files. If they want the moon, I refer them to other practicioners as I am too busy making money elsewhere.
Everything in 3D, plus some 2D line work for good plotting.
Civil 3d - and we draw nearly everything in 3d where possible using feature lines.
2D
Only put 3D polylines on frozen breaklones layer.
The joys of Carlson field to finish. Draw all your line work in 2D and 3D at the same time, PLUS all blocks inserted, all labels added on trees, inverts, control points , etc. Anything else is a waste of time. NEVER draw the same line twice.
cptdent, post: 330953, member: 527 wrote: The joys of Carlson field to finish. Draw all your line work in 2D and 3D at the same time, PLUS all blocks inserted, all labels added on trees, inverts, control points , etc. Anything else is a waste of time. NEVER draw the same line twice.
When your client gets the cad drawing does it have both the 2d & 3d polylines/points still on it or do you remove the 3d ones once you have made the surface?
2D
One 3D drawing in 20+yrs, an ALTA a few years ago.
If using C3d (or LDT) you can use "Proximity Polylines" as breaklines. That is, 2d polylines together with the 3d points to make 3d "fault lines".
But I have to say that I don't understand your comment about 3d lines making your hard surfaces appear crooked. Unless you are viewing them in something other than plan view.
Totalsurv, post: 330987, member: 8202 wrote: When your client gets the cad drawing does it have both the 2d & 3d polylines/points still on it or do you remove the 3d ones once you have made the surface?
They get everything.
I generally have mix.
Painful when I pass onto an architect as they need 2D.
Then have flatten all.
Not a big deal, just another process.
But I have to say that I don't understand your comment about 3d lines making your hard surfaces appear crooked. Unless you are viewing them in something other than plan view.
In 2d if you forget a point along a curve you can 'guestimate' it and it would look better in the final draft. You can't do that in 3d, every vextex has to coincide with a field shot or else you have to either create a new shot with correct z before you could even make it part of the curve.
Also autocad is a PITA when it comes to 3d drafting. I have to switch back/forth to microstation for the 3d drafting part.
