All posts by Kapanther

When trimming with 3D polyline and Live Preview on, Autocad Freezes

Getting an error in 2015 when trimming lines with a 3d polyline. (see attached drawing).

Download 0011 – trimming 3d polylines 2015_test1

I select the complex 3d polyline as the trimming line, then when I go to trim the lines. IF I accidentally hover over the 3d polyline I am using to trim it just freezes for up to 5 minutes.

If I turn off live preview I don’t get the error?

The more complex the 3d polyline the longer the wait!

What’s wrong?

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Deleting an Input Parameter in Subassembly Composer will freeze program

Create two input parameters, rename one, delete the other. Subassembly composer freezes.

been there since 2013! please fix

http://forums.autodesk.com/t5/autocad-civil-3d-general/subassembly-composer-error-when-deleting-input-parameters/m-p/4917228/highlight/false#M245108

Have been told that this will be fixed in the later release!

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Free File Sync – Folder Syncronisation Program

I have used a number of free “folder comparison/syncing” programs over time. But this one is awesome.

Highly recommended if you need to compare network locations regularly and update etc..

Just don’t install the nonsense application it recommends when installing it

Download here

https://www.freefilesync.org/

Custom Synchronization Options

Really easy to visualize the way you want to update files. Create custom syncs that you can run regularly.

Basically gives you two lists, shows you what’s going to be updated. Just click to make it happen.

I particularly enjoy the fact that it keeps a DB on both sides so next time you sync it can check if anything has changed in both locations..!

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Osnaps and overlapping surfaces causes civil 3d to freeze/crash

Well after some basic investigation I have found the problem.

Overlapping surfaces that both have contours displayed will cause freezing when osnaps is turned on.

Download the example file here – onsnaps-freeze1,  see image below for explanation. Try and draw a polyline over the top of the overlapping area with onsnaps turned on

I can confirm that this happens in both Civil 3D 2014 and 2015. With 2015 recovering slighltly faster than 2014. say 3-5 minutes instead of 10 – 15minutes

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Importing high resolution imagery from Google to CAD using QGIS

See my previous post here to see the full process. This is an expansion on this process to bring in more or better quality imagery.

Once you have setup your coord system etc. as per previous post, you then want to zoom your screen down to the desired resolution. I find going one zoom level further in than you like is usually a good strategy.

Now you want to keep pressing “save as image” then panning your screen around to get the tiles you desire. Just use your middle mouse button, don’t zoom in and out. Give the images about 5/10% overlap.

Once you have saved all the images you need. Just read them back in to have a look at the finished result. I have saved 6 images below.

Now I want to merge them together as one image.

Raster -> Miscellaneous -> Merge

image004image005

So now you just need to output your merged image in the desired coordinate system.

Right click the layer and press “save as”

Make sure you tick “rendered Image” and specify your desired coord system.

Give it a short moment to output

Now read into cad. Don’t forget to set your units to “meters” on command INSUNITS if you are using the metric system.

You should now have an image in CAD that is better resolution, or covers a more vast area

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Surfaces with holes do not paste correctly into other surfaces

A common problem with Civil 3D. If you have a surface with a hole, the hole will not be filled with the surface you are pasting into. It will triangular across the hole like below.

Pond with hole in middle

Pond design with hole in the middle

When pasted together the middle is wiped out. Rather than the middle been taken by the existing surface pasted in first.

Pasting together removes the first surface definition and creates and empty space

I know you can create a “hole surface” as workaround, but this isn’t as dynamic.

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Modelling a tailings deposition using Civil 3D – Kriging – Perimeter Deposition

This was a question sent by email . see my original basic deposition post here

Q: Thanks Brad. Looks like a good solution for this scenario where the spigots are in a straight line, but how would you go about doing a perimeter discharge (the most common type of TSF). The pathways and guidelines would be crossing over.

A: It’s a good question, I generally wanted to just show the basic concept in the original post. To do a perimeter discharge you just draw pathways coming back the other way and very roughly trim them up.

Here is how I would tackle it using the same method.

I start by making the one spigot discharge into a block. Then use the measure command to space it around the complex at 200m intervals. Align that block to the line and you get something like below.

permiter deposition
permiter deposition

 

I delete a few of the stranger spigots, relocate as necessary then I just keep trimming the lines inside the block until I get to a point where I don’t have too much overlap. Like below. (If I trim in the block, they all change at once. J)

Perimeter Tailings Deposition, trim up block lines before exploding
Perimeter Tailings Deposition, trim up block lines before exploding

Trim any major areas of overlap and then check your rough triangles surface, near enough is good enough here, minor overlap will be taken care of by the kriging routine,

Perimeter Tailings Deposition, check result in basic triangulation
Perimeter Tailings Deposition, check result in basic triangulation

Now just krig and trim, not a bad result I think?

Perimeter Tailings Deposition, finished result
Perimeter Tailings Deposition, finished result

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