AutoCAD Civil 3D :: Slope Analysis Using LIDAR Topographic Base Information

May 10, 2012

Succesfully producing a slope analysis exhibit using LIDAR topographic base information with this version of Civil 3D? I have followed the instructions as best I can and have had no luck. I am using a trial version and this is a big factor in whether or not I will ultimately make the purchase.

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AutoCAD Civil 3D :: Slope Analysis - Ranges Set To 10

Oct 12, 2006

I can not get the slope analysis to come up with 10 slope ranges. My ranges are set to 10, but my Range details populate to 22? Screen Cap included. I've tried this with Equal Interval, Quartile, and Standard Deviation. Nothing will create 10 intervals.

My "slope analysis" surface style is set to show Slope, with the range set to 10. In surface properties, my range is set to 10.

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AutoCAD Civil 3D :: Slope Analysis By Direction

Mar 27, 2012

I need to be able to do a slope analysis on a surface, but I need to have it calculate the slope in a direction - east and north.  Any way to do it?  Maybe even if there is a quick way to apply slope labels to a surface based on a grid - say the slope from N0.00, E0.00 to N0.00 to E 25.00

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AutoCAD Civil 3D :: Superelevations And Sub-base Slope

Jun 11, 2012

I need to have a subassembly for a superelevation where the lane and base slope to the left and the bottom of the sub-base will slope to the right. I was using the LanSuperelevationAOR subassembly, which worked fine with my superelevation when the lane, base and sub-base were all sloping the the left, now I need to edit the slope of the sub-base only to slope back to the right at a -2%.

Windows 7 x 64
8GB Ram
Intel Xeon CRU 4 Core @ 3.07GHz
Civil 3D 2012 .....

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AutoCAD Civil 3D :: Slope Analysis Showing On One Computer But Not The Other?

Mar 30, 2012

same drawing, two computers both with Civil 3D 2012 SP1. 

one computer opens the drawing and the surface analysis by slopes shows perfectly, the othe computer opens same drawing and it shows no slope analysis but everything else. They can even change the style and analysis and can view slope arrows, elevations, etc.

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AutoCAD Civil 3D :: Slope Analysis Legend To Show Percent Of Range

Apr 16, 2009

I am working on creating a surface style, legend and surface settings to create Slope Analysis Maps. These maps show a surface with different colors of hatches in triangles of the surface that are within the specified ranges. I have 3 ranges, 0-10%, 10-20% and 20-100%. I have been able to do everything but include the percentage of the area of the range over the total area of the surface. I thought maybe an expression, but doesn't look like you can have expressions for table styles. Attached is a pdf that shows my legend and a surface with the style.

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AutoCAD Map 3D :: DWG For Slope Analysis?

Jan 5, 2012

If I only have sketchup terrain model which I could export to DWG.Am I able to bring that DWG into Autocad MAP 3D to do slope analysis?If not, how should I do? What kind of file type I need? Or I need more information other than a model to do slope analysis in Autocad MAP 3D?

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AutoCAD Civil 3D :: Profile Geometry Editor - Slope-Slope Intercept To Place PVI

Aug 20, 2012

Can you not perform a slope-slope intercept to place a PVI?  Essentially holding the sta and elev of the PVI's directly before and after the PVI of interest and changing the grade in and out so that the sta and elev of the PVI of interest are changed.

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AutoCAD Civil 3D :: How To Match Gutter Slope To Outside Lane Super Subassembly Slope

Mar 22, 2011

Can't figure out how to match gutter slope to outside lane super subassembly slope.  Have super eop targeting a feature line with elevations, but when i check section editor gutter slope doesn't match pavement slope.

Civil3D 2013
Windows 7, 64 bit
Intel i7 2600 @ 3.40Ghz
Nvidia Quadro 600

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AutoCAD Civil 3D :: Shoulder Subassembly That Varies Slope In Relation To Lane Superelevation Slope

Jan 22, 2013

i need a shoulder subassembly that varies slope in relation to the lane superelevation slope. i know that i can get a subassembly for the shoulder that will follow the alignment superelevation xml data but in my case i can't use it because we are just adding a shoulder to an existing road. we're not changing the superelevation of the existing road, just milling and overlaying and widening. right now i've created a profile of the outside edge of the shoulder that gives me the correct shoulder slope but whenever i change my centerline profile i have to redo the shoulder profiles which is a real time suck.

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AutoCAD Civil 3D :: Slope To Depth Of 10 Feet Than Change To 2:1 Slope

Aug 13, 2012

I am in the process of transitioning from land desktop to Civil 3D. I design roads in steep terrain and sometimes need to have my catch (daylight) slopes change. So my question is, how do I change a daylight slope at a specified depth? For example, from the shoulder of the road I want a 3:1 fill slope to a depth of 10 feet than change to a 2:1 slope until it catches the existing surface. Can this be built into a subassembly such that if the fill is less than 10 feet it will daylight correctly at a 3:1 and if the depth is greater than 10 feet then it carries the 3:1 for 10 vertical feet and then changes to the 2:1 until it daylights?

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AutoCAD Civil 3D :: LiDAR Classification

Aug 17, 2010

I have several LAS files that I have brought into AutoCAD and created PCG point cloud files. You have the option to assign Civil3D properties so I assign the LAS classification properties but they don't apply to the file.

The classification style seems to work with the ISD file extension in Civil3D, but do the LAS classifications not work for the PCG format?? I can only view the PCG file by single color or by elevation range, not by classification.

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AutoCAD Civil 3D :: Add Base Or Sub-base Depth To Transition Lane?

Apr 6, 2011

Is it possible to add a base depth to the transition lane assembly?   I need to do volumes for my road, (pavement, base) but there is a section with a transition (which only has one depth), so that section is off.

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AutoCAD Civil 3D :: LAS LiDar Import Keep Getting Error?

Dec 20, 2013

In Civil 3D 2014 while import .las or .asc file using point cloud I keep getting an error in processing data message.

I have in the past brought in the data successfully (2012, though not often)?

Datum and projection are correct, the data goings in to ArcGIS(had GIS group five the file a try).

The error message in not any more specific than "there was an error processing data"

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AutoCAD Civil 3D :: LiDAR Generated Surfaces

Jan 14, 2011

I have recently upgraded to Civil 3D 2011 when we started receiving LiDAR data.  I have been playing around with the data a bit and have a few questions on how the data is dealt with.  It appears that when a point cloud is added to a surface, it is using the point cloud display somehow to generate the TIN.  I believe that the point cloud display is showing a percentage of points based on the maximum number of 1.5 million points.  On these particular datasets (citywide LiDAR coverage, about 2,600' x 2,600' panels), we may have 4-7 million points in each LAS file.  Is Civil 3D ignoring all points beyond 1.5 million in surface building operations?  Also, when adjusting the slider, is there any way to know which points will be displayed...or maybe the points are reduced randomly??

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AutoCAD Civil 3D :: Gaps Between LiDar Tiles

Nov 19, 2013

I'm working with an area around a couple miles of road running SW to NE. I have metric lidar tiles in GeoTiff format. The tiles are 1,500 meters on an edge. I'm working in US Survey feet.

I originally tried creating a Surface of all 9 tiles I needed and then cropped the resultant Surface. But that was too large for my computer to handle. So I created 9 drawing each with one tile Surface in it. Now I've created a Data shortcut Reference for them all in one drawing. I got all the Surfaces in but noticed that there were gaps between the borders.

I was wondering if it was a coordinate system conversion problem. But all the settings check out. Now I think that this may be an expected behavior. I measured the gaps between the Borders and found that they all ran very close to 6.56'. In metric that's almost exactly 2 meters. 2 m is the separation of points in the Lidar surface.

BTW I'm working this in 2014.

Civil 3D 2012 SP 3 / IDSP 2014
Dell Precision T7400, Xeon CPU 3.16 GHz
Win 7 Pro, 64-bit,12 GB RAM, Nvidia Quadro FX 4600

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AutoCAD Civil 3D :: Create Model Of Topographic Map

Nov 3, 2013

So I have a topographic map on Civil 3D, is there a way to generate a 3D model of it?

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AutoCAD Civil 3D :: Raising Topographic Survey

Dec 23, 2013

I am trying to adjust (raise) a very intensive topographic survey from NGVD 1929 to NAVD 1988.I know how to raise the surface and I know how to adjust the datum of the points.

How to raise all the breaklines used to develop the surface as well? This would include survey figures, feature lines and 3d polylines.I want to raise them all by an equal amount.

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AutoCAD Civil 3D :: Simple Lidar Surface Clipping

Apr 19, 2013

I've been downloading whole tiles from OSIP for lidar surfaces.  I've been using the grid files, and they work great.  But, I don't really need an entire tile while working in my drawing, and I'd like to clip just my area of interest out of the tile.  What is the fastest way to do this? These whole tiles are data hogs, and I fear they are slowing me down. 

I used to have a computer at my old job that wouldn't slow at all using this stuff, so I haven't had a reason to learn how to do this until now when i'm forced to work on a laptop. 

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AutoCAD Civil 3D :: Import LiDAR From GIS Shape Files

Jun 20, 2013

I wanted to import a shape file from GIS, but all contours elevations are 0. The attribute data on contours have ID elevation. How do I query those ID elevation to the contours?

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AutoCAD Civil 3D :: Smooth Road Profiles Created From Lidar

Aug 14, 2012

We have lucky enough to obtain LIDAR for most of our small City as well as ground only points.  My problem is that profiles produced using it are rough and jagged (see attached).  I've tried contour smoothing to no avail as well as point removal.  Perhaps I haven't just tried enough options.

Should mention also I have breaklines along the CL alignment as well as Edge of Pavement.

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Photoshop :: How To Create Base Template For Metadata Information

Nov 6, 2012

A friend asked me how to create a base template for metadata information (file/info/description). The basic info is my name, address, copywrite, etc.  I had created this on a previous version of Photoshop and was able to migrate it to PS6. However, in trying to answer his question, I have lost my own template. How to recreate this.

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AutoCAD Civil 3D :: Slope Map Display

Jul 1, 2013

The undefined areas of a slope map now have a hatch to them and are plotting black. This map was created a month ago in 2012 without issues, upgraded to 2014 and now the undefined range has hatch! 

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AutoCAD Civil 3D :: Get The Slope At A Point (x And Y)?

Jan 2, 2012

I have a TIN Surface, and I want to get the slope at a point (know X and Y).

Working Civil 3d 2010 and API.NET

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AutoCAD Civil 3D :: Using Negative Cut Slope

Oct 30, 2012

I have a simple driveway corridor along a steep hillside.  For cut, I would like to have a negative slope away from the shoulder edge.  I have tried numerous approaches and all 'cut' reverts to positive.  I searched and found no clear answer.  It's such a short driveway, I can 'fake' it in, but I would like to calculate quantities. 

Using 2012 sp1, 64bit, windows 7

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AutoCAD Civil 3D :: River Analysis DWG

Jul 6, 2012

Am working in River Analysis dwg and go to save and get message "One or more objects cannot be saved to the specified format."

What's the deal?

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AutoCAD Civil 3D :: Can't Display More Than Two Slope Ranges

Jul 8, 2013

I've got a surface that displays contours correctly. When I go to Surface Properties-Analysis tab, I can  set an arbitrary number of ranges for contours, directions, elevations, slope arrows, etc, and they display correctly.

I can set an arbitrary number of ranges in the slope range box too, but when I click the Analyze button, Civil 3D 2014 hotfix 1 only displays two slope ranges: 0% to 2979736.0077% and 2979736.0077% to 99999900.0001%. (!)

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AutoCAD Civil 3D :: Auto Slope Patterns?

Aug 10, 2013

Can I automatically have my slope patterns introduced with a command like matchprop or something similar ?

I have 284 streets and it's getting ages to finish the slope patterns on every street. Civil Engineer / Infrastructure of metropolitan transports. URL....

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AutoCAD Civil 3D :: How To Round Off Top Of Graded Slope

Mar 21, 2013

I'm trying to match an existing slope design that has a soft rounded off top of slope.  The toe (green) is a feature line and I'm using a 1-1/2:1 slope to natural surface grading rule.  You can see the rounded contours in blue that I am trying to match.  

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AutoCAD Civil 3D :: Link Slope To Surface

Nov 7, 2012

in my link "link slope to surface", i have the slope set to -2.00%. in the cross sections, it is at a +2.00%. why is this thing not linking at the defined -2%? see image.

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AutoCAD Civil 3D :: Determine Elevations Along Slope

Dec 3, 2013

I need to project a surface/grading (or something of that nature) across my berm and have it intersect with the inside bank. This is better explained if you see the attached image. In the plan view you see 4 featurelines. Outside TOE, outside TOB, inside TOB then inside TOE. I need to project the outside TOE across the berm (shown in the section view) then create a new featureline where the line and inside slope of the berm intersect. Note that all the elevation shots vary as does the widths across the berm. What's the best way to do this?

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