AutoCad :: Developing Contours For Noise Survey
Aug 15, 2012
I was wondering if it is possible to develop noise contours such as seen in noise contour mapping. I understand one could just hand draft some polylines in but the degree of accuracy I would like to obtain would then not be sufficient. I have a grid based structure
currently on a topo map and have the measurements for each block (the blocks are a 10' by 10' area). From here I am lost to how one
would approach creating noise contour maps. Noise isopleths or in general creating measurement based contours?
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May 30, 2012
trying to create contours from an exiting survey file. I am new to Civil 3d 2012. What I need to accomplish is create a 3d topo from the points with contours and then create a 3d model of the area.
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Nov 15, 2012
Some background: We have a composite surface of existing surveyed contours as a TIN pasted into existing aerial contours that we received from a client. We used polylines to generate our proposed contours, and then generated a proposed surface from that. We've made a blank surface, pasted in the existing surface, and are trying to paste in our proposed surface... only the existing contours outside of the proposed suface no longer line up correctly once we do.
We've tried applying the method laid out here: [URL] ........ (and the link referenced in the bottom) but are still having trouble getting the surface to work. We've tried offsetting as little as 0.25' and as much as 5' with the feature line draped over the existing surface, but it seemed that the greater the offset, the greater the discrepancy.
Just to make sure we even tried that correctly - should the breaklines that we add be standard or non-destructive? (I've tried it both ways with little success either way, so I don't know if it matters much in this instance, but perhaps for future reference it would work.)
I've attached a screen shot of our surfaces. The pink and green lines are the proposed contours, the white dashed are the existing. The outer red line is offset 0.25'. As I've mentioned, we've tried offsetting various amounts with decreasing success.
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Nov 19, 2013
I copied some Survey Data of AutoCAD Civil 3D 2013 for Surveyors to my C3D 2013 machine few weeks ago. Now I cannot do the "Import point file" of the Survey2 Data B in Survey Databases, because the Survey2 Data B is locked up - see the attached file that has a red circle with an arrow on. How I can unlocked the locked Survey 2 Data in the Survey Databases.
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May 3, 2012
here's my process:
1- Import the asc file into my drawing.
2- Convert the asc file to a FBK file
3- Import my FBK file. The survey figure linework generated doesn't overlay my previously imported asc file. I checked the FBK file and the coord's match the asc file. I'm confused as to why the survey figures don't overlay the survey points from the asc file, since the coords match in both? The survey figures are all shifted .7' and 54deg. from the points. The elevations are all good on the survey figures, as they match the survey points.
So my quick fix is to explode the survey figures, since I don't really need them for what I'm doing, and then select all the 3d polylines and move them to them to an appropriate survey point. Everything then looks fine and I can get the job done.
However, I would like some insight as to why this might be happening. It's strange that the FBK and asc coordinates match, but the survey figures aren't lying over them.
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Jan 24, 2012
i am using visual basic to develope a pdf to dwg converter.
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Dec 12, 2011
need to develop the Inventor part based on the autocad drawing. Its a spiral flower step for kids playground.
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Aug 7, 2013
We are a transport engineering firm in Queensland and I would like to develop a spreadsheet that can formulate cross member distances and recalculate to add or remove cross members.
The basis of this is the overall size of the body we are building.
For example: The maximum width of a body in Australia is 2.5metres overall. Our cross members would be 6 mm shorter than the overall width of the body to allow for 3mm end caps to cover the open ends of the cross members. So the length of the cross member is width minus 6, or , parametrically the length is (overall width - (endcap thickness x2))
The body length is the tricky one. We have a maximum spacing on the cross members. This will vary from size of body to size of body. EG the spacing on the small 2 tonne body will be different to the spacing on the 12 tonne body etc. So lets say we want to have maximum spacing of 450mm and a minimu spacing of 300mm between centrelines of the cross members. The overall length of the body will also determine the number of cross members required.
On top of this there is the front and rear coaming to take into consideration.
So the formula would be ((overall length - front coaming - rear coaming) divided by cross member spacing)) then a check to see if the last space is what and then can we change the cross member size to take up that space without going over the maximum space. We would also need to take into account the width of the cross member section as well in this calculation.
EG if we have 150mm left at the end we could increase the cross member centres slightly to take up this additional space without going over the maximum space allowable.
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Oct 29, 2013
Attached is a simple drawing of a round tube sitting on an imaginary level grade. I'm needing to develop a pattern to cut the bottom angle. I'm making a scale model and this is one of the elements. The scale is 1"= 10.66" so this round tube will be 4.5" in diameter. The angle is too gentle to cut in my horizontal band saw; can't fit it between the guides. Years ago, we used to grid out from a base line and develop a continuous curved line on flexible linoleum that when wrapped around the tube, would allow a line to be drawn on what would be my grade level line.
We would then cut the steel tube with a torch on said line. Did this for 24" to 90" diameter pipes. I need to do this for this one cut; I think I can get all the rest of the angles for the project on the saw. I'm hoping that the printable (can be done on more than one sheet if needed and taped together or something) paper pattern can be rendered easily, such as a sheet metal shop might develop a flat pattern for rolling or bending. I'm limited to legal size paper, 8.5 x 17". I'm using AC LT 2011 so I'm limited in my abilities.
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Apr 24, 2012
Am I better off using the Olympus software to develop my images, then using PSP X4 to edit them? Regardless of which software I use to develop, why make any editing changes before I develop if I can then edit after I convert to a Tiff or JPEG?
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Feb 19, 2012
All my dng's (with development changes) are visible in the lightroom library but they will not load when I want to develop further. This started after I tidied up my backup files.
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Feb 20, 2013
How to put text under photo's after developing in lightroom 4.3
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Mar 6, 2012
Installed LR4 today and ran into a problem.I have been working with alot of negatives lately and therefore my photos have a reversed tone curve. When I converted my existing catalog all looked fine, using the old previews. But when I go into develop on any of the photos the tone cureve gets reset to normal behaivour, and I have to redo the "invert". And all this using the old process (2010).
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Aug 25, 2013
how can I retrieve my basic developing panels it just disappeared?
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Nov 25, 2012
I am wondering if this could really be the intended LR behaviour? I start from a smart collection, one of the criteria is "has no adjustments".
Ok, as soon as I move the first slider in develop module, it no longer matches that criterion. But that should be no reason for LR to force me to immediately stop the develop edits on the selected image.
It immediately unselects, and I stay in Develop module with a grey window and the message "no image selected". (It does not move on to the next image, which still matches the criterion.)
I would expect that when I return to Library module, it would return to the same smart collection where I started, but I would not find my last developed images there, as they no longer match the criterion. But that LR grabs it immediately out of my develop selection?
Strange enough it stays the same, when I first explicitely selected all images while in Library/smart collection.
My expectation would be that I have this selection fixed to work on in Develop module. Similar to when I select any images from survey view and go to Develop module.
But no, the only workaround I found is:
Start from the smart collection, ctrl a to select all, then arbitrarily click on another collection withput this criterion - selection stays fixed - then move over to Develop module.
This is LR4.1 on Win7.
Definitely my functional specification would be: never take off an image from Develop unless the user moves on to another image. So ignore from where an image was picked.
Would you consider this a bug? Or a "feature"?
Do you see the same in LR4.2 or 4.3RC? Behaviour on a Mac?
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Dec 17, 2012
After upgrading to Lightroom 4.3 in Windows 7 64Bit I often get random problems during DNG developing. The first problem: LR during developing shows on image thumbnail the exclamation mark icon of "metadata conflict" warning (see attached screen snapshot). This problem occurs when an external program (i.e. PS) has modified the DNG file and LR Catalog is not synchronized. Of course no modification at all has been done externally by any software but LR itself! It seems a problem of DNG/catalog sync that in some cases fails (very disappointing). The second problem is the black exclamation mark (see again attached screen snapshot) that means problems during reading DNG!! This problem is absolutely random too. Developing is still possible on this files and usually the problem disappear ...
This problems don't affect proprietary RAW files (NEF from my Nikon D300s) and I've never seen them in Lightroom 4.2.
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Dec 3, 2013
how can I develope a proper piping system just like the one in the attached picture in AutoCAD 2013.
As you can see the tubes aren't that greatly connected.
Each tube is blocking the pathway of the other tube.
I need them to be all connected.
The reason why, is because I will be later using this design in Inventor Fusion and Simulation CFD to have fluid in the tubes.
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Oct 6, 2011
We are looking for a workflow example of developing casting models into machining models.
Typically our castings are made from different materials (Fig-1) and then machining (Fig-2) are created from these castings.
Is creating the casting as an iPart (with different materials) and then deriving the machining from the casting the proper method?
Doing it this way seems to force us into making a machining for each casting material instead of just one machining that is an iPart. How should this be set-up for BOM purposes and for use with Vault (Base Version)?
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Jun 29, 2013
I have a few points within an area of 2m x 2m and I will like to create contour lines. At the moment I can only produce models with shade difference.
Thge contour command does not accept sub 1 metre accuracy (putting 0.1m does not work).
Is there something I can do?
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Jul 23, 2013
I create a contour layer from a DEM raster and everytime it comes out about 700' offset from the DEM.
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Dec 5, 2011
Im trying to make a 3d model of a site in AutoCAD and it seems lofting between some contours is impossible, this is driving me insane, first it told me there was a U and V derivative problem so i loft the surfaces that i could but now there is a gap where it refuses to loft and i cannot create a surface in that gap using network or blend or pach.
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Nov 27, 2012
i'm exporting a surface from 2013 to be used in 2010 for presentation. works great but the contour interval is not the same as the surface i'm exporting. working in 5/25 contours...xml import comes in with 2/10 contours. looked for a setting but can't seem to find.
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Oct 23, 2012
I'm drawing a topo and trying to figure out a way to manually smooth out my contours. I'm not talking about the little jagged edges that you can remove if you use the smooth surface option under surface properties but the big ugly looking jumps you see when contouring a relatively flat lot. In the ancient version of AutoCAD my company used the contours came in almost like splines and you could move the vertices around to make them look good. I know you can go in and delete some TIN lines and edit point elevations but that is very time consuming and I'm hoping there is a quicker way.
I know I can extract them into polylines but there are too many little segments to be useful. I've seen the SIMPLIFY SURFACE option and while that takes away some of the roughness it creates some as well. Is there some better option than extracting and then drawing a spline between the parts I want to smooth out? These contours don't need to be 100% accurate, I just need them to look simple, like if someone was drawing them by hand.
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Nov 20, 2013
I have added contours to my surface (the blue lines). For some reason the surface generated contour (the orange line) is jumping across the contours I've added.
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Oct 18, 2011
When exporting 3D contours, what property do you use to export the elevation to attribute data in the shapefile?
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Apr 25, 2012
My TIN surface either did not generate contours or did not display them on my drawing. I created and tried surface styles of many contour intervals(from 0.5' and 4' to 2' and 10') without success. I made sure my contour layers on both the Style Dialog box Display Tab and Layer Properties Manager were turned on, still no success.
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Nov 26, 2013
I'm having problems contouring in C3D 2014.
I'm using the command PL - polyline to create my break lines (Centerlines, top and bottom of curb)?.
In this particular drawing the first point I click on is carrying the elevation throughout the entire length and yielding bad contours.
Essentially the bottom of curb on each side of the street should be the same elevation with a crown at the centerline.
Instead the elevations are about five feet different because the beginning point is around the corne at a point of tangency on a hill.
This has not happened in any other drawings and I've done them the same way.
I redid the breaklines with the 3DPOLY command and aside from a few minor edits the surface came out OK.
I've been reading about 3DPOLY command but have not found out too much about what the actual difference is between 3DPOLY and PL commands.
Seems like 3DPOLY is the way to go.
I do not have too much experience with C3D 2014 and am making a huge jump from 2004 LDD. How to build 3D surfaces/contouring.
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Feb 15, 2011
I'm trying to label elevations on some large contours.
The problem i'm having is that 'multi line' does not give me enough elevations, while 'advanced placement' gives far to many elevations for mapping and plotting purposes. Is there a way to have more control on how Map labels contours?
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Dec 9, 2011
How to draw contours in Autocad 2010 LT? Is it possible without eagle point?
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Sep 9, 2012
When I generating contour(surface) using Civil 3D it gives very complicated contours.Some times those contours cuts each other and have very strange shape.
I used to use SURFER software to generate contours.It gives simple contours.But I like to use Civil 3D because.
I attached SURFER contours and Civil 3D contours. I also attached AutoCAD file those who using older versing of Civil 3D.
I know how to smooth contours in Civil 3D but it does not solve my problem. You may say "You should use commands like swap edge,delete line .
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Sep 1, 2013
I want to color fill between contour lines. Most of the plug-ins I have tried only color the actual contour lines. Some of the large stand-alone packages say that they do it, however most are beyond my maker financial reach.
So my queries are: can this be done within any AutoCAD package? Are there any known plug-ins that can do this?
Or will I have to commission a customized plug-in. The image below is an example of the color fill required.
DH Colored Cont Image of 001.jpg
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