AutoCAD Civil 3D
Surfaces don't have breaklines.
With that being said, you can add breaklines to your surface as data but a surface doesn't have breaklines, it has triangles. If you want to see your breaklines, turn on the layer of the objects you added to your surface.
Same goes for boundaries. You can't display the boundaries of a surface because that is data that is added to the surface. You can display the border of the surface which often times will coincide with a boundary but they are two seperate things.
If you have deleted the breaklines for your drawing but not your surface, right click on the breaklines under the surface definition and choose "Insert to drawing".
sboon wrote:If the breaklines are part of the surface definition then how can you say that they`re not part of the surface?
The breaklines are used by the surface to create triangles similar to the way an artist uses a chisle to create a sculpture. You can't look at a sculpture and see the chisle, just the affect the chisle had on the stone. Just because a surface uses something when building, doesn't necessarily make it a part of it.
Perhaps another analogy would make more sense. When you sample a surface for a profile, that surface is not a part of the profile, it's data that the profile is using to determine the elevations.
Contours are calculated from the surface and can be displayed.
Triangles are calculated from the surface and can be displayed.
etc.
Data is added to the surface. If you want to see the data, go look at it in the drawing or the file (as in a point file) or...
I do agree that it would be nice to be able to highlight or select in the drawing the data that was added but currently that's not available.
gleep wrote:Steve,
Yes, my breaklines were created from survey figures--top of bank, bottom of bank, top back curb, bottom face, ep, etc--many different figure lines on many different layers. And yes, they are still in the drawing. And yes, I could go through and isolate the various layers housing my various objects used to create the breaklines, but I've got linestyles in play along my EP that I don't want to manipulate. I guess I'm just lazy and was looking for the SURFACE FAULT layer that Land Desktop creates. One Layer to Rule Them All. A layer to which I can assign specific attributes so as to better visualize the breaklines defining my TIN. Keep up with them. (I've mentioned that I'm in deep transition to C3D.)
Brian,
Although I suspect your argument may be mostly semantics, I'm not sure I'd agree with the verbage that a surface does not have breaklines. (Semantically, you might here argue that breaklines are used to BUILD the surface, they are not OF the surface, but for all intents and purposes... )
In my mind the breaklines are integral to the surface. At least as integral as the points, which I CAN display with a lightbulb in the SURFACE PROPERTIES. I can visually keep up with every element defining the surface, in fact, except the breaklines, which seem to be more troublesome to SEE, short of individually selecting every object/figure or maybe creating a layer state, copying lines, constructing them with MANUAL LABOR.
I suppose I've grown accustomed to the SRF-FLT layer used by Land and I like my faultlines to stand up and announce themselves on the screen.
Thanks.
You can use the same polyline, featureline, survey figure, parcel segment, etc. in multiple surfaces if you want to. In fact, I have ofen used the same featureline as a breakline and as a boundary in the same surface so, in that case, which layer should it be on?
I hate to say it but you are currently stuck in the "This is how it worked in LDT, why doesn't it work that way here" situation that almost all of have been in. I was really bad when I first started. Don't believe me? Search the forums for some of my earlier posts. Don't worry, it'll pass. Just keep asking questions here and you'll soon be a C3D MASTER! 
