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▲ 19 r/civil3d+1 crossposts

Civil 3d training resources

To make a long story short due to circumstances beyond my control I will becoming the most senior person in my office when it comes to transportation and site design. The issue is I have only 2.5 years of experience which has predominantly consisted of markups, stormwater design, and plan production.

My boss essentially told me I need to get really good really fast. While I may have more knowledge than I give myself credit for my plan is to utilize resources on my own time to basically start from square one to develop a comprehensive understanding of all the pieces that go because my knowledge as it stands now is very piecemealed together.

So I’m essentially asking you good folks to give me some resources and best practices for my training moving forward and it’s worth noting that I have received no formal training and the resources I have through the company are essentially a joke.

Sorry for any errors or formatting as I am very overwhelmed

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u/TurbulantWater — 5 days ago
▲ 11 r/civil3d

Horseshoe Curve PA: 1854 cut and fill, lidar DEM into Civil 3D

The Horseshoe Curve west of Altoona, PA is an 1854 cut and fill that reads as one clean bench in bare-earth lidar, so it's a good existing-ground surface to try. It was built with picks and shovels, horses and drags, and opened February 15, 1854. J. Edgar Thomson designed it for the Pennsylvania Railroad to ease the westbound grade to the Allegheny summit. The crews put an earth fill over Kittanning Run, cut through the mountain point between the two ravines, then filled Glenwhite Run. It's about 2,375 ft long, 1,300 ft across and turns 220 degrees.

In Civil 3D it's Home tab > Create Ground Data panel > Surfaces drop-down > Create Surface From DEM, then pick the .tif. For a grid surface the file's coordinate system has to match the drawing's or it can't be added, so set the drawing first.

The bench is the smooth band looping around the reservoir's west end. A DEM carries no breaklines, so the bench edges are only as sharp as the grid. The reservoir is a flat patch, lidar doesn't see below water.

Numbered pins on the picture:
Pin 1: The smooth graded bench at the curve's apex
Pin 2: The flat reservoir water surface

Lidar: USGS 3D Elevation Program (3DEP), public domain.

u/Northing_Labs — 5 days ago
▲ 5 r/civil3d

Cogo Points vs Autocad Points workflows

Hey everyone, I'm looking for some perspective on a survey CAD file I received recently from a survey firm. Their drawing doesn't have any cogo points but instead has autocad points and mtext labels.

I know they can be converted to cogo points and added to a survey, but is there not some loss of functionality compared to cogo points? Now you can't sort by the point description or change your surface definition by point description. Same goes for setting or changing the label styles/label rotation of the points.

What is the benefit or reason why a firm would choose to use this workflow? I'm guessing they originally had cogo points to develop the drawings but then exploded them before sending the files.

Thanks

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u/Straight-Spell-9930 — 14 days ago