AutoCAD Civil 3D :: Finding Lowest Elevation Inside Of Polygon
Dec 16, 2013
I have a need to find the lowest elevation inside of a small rectangular polygon (6'x7'), then assign the polygon to that elevation. This is fairly easily done manually with feature lines, however I need to repeat the operation about 3,000 times to create a design grid (therefore, not obliged to using all of the design budget to do so).
I employed the GIS department to run the analysis, which they can do, however they can't rotate the DEM grid output to match my project because it doesn't run parallel to north/south, thus skewing the results.
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Feb 9, 2012
I have thousands of polygons (and circles) which represent 2D foundation detail.
I have XY Location data (XLS, CSV etc) and Z's for the tops and bottoms of all these objects. (and hence, AutoCAD points)
I have used SHP data before (for the building footprints, and tops) whereby the top and base data is included in the data and I have use mapimport with change properties to thicken polylines and create quick 3D objects above ground.(This was created by others using a method similar to what I want, but in a competitors GIS...)
I need to do the same with the footings.
How can I create a "search" that says - for each polygon, look for a single point inside, and report its elevation and attached that to the polygon as data? Or, create a SHP of all these polygons with RL data queried of the internal point.
The points arent necessarily at centroid, which could be an issue. (Most are, however)
There is no keyID data between the polys and the points (so data joins wont work)
A friend did this very quickly for me in an ESRI Package, surely MAP can do the same!?
Map 3D 2012, and a monstrously powerful CAD workstation... just, er, not the knowledge to yet pull this off.
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Apr 24, 2012
I will try to write this as clearly and shortly as possible.
I have two surfaces created lets call them Surface A and Surface B.
They have different elevations in different areas, sometimes Surface A is below Surface B and other times Surface B is below surface A.
Is there a way to easily create a Surface C which is a combo of Surfaces A and B taking which ever surface is lower?
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Apr 30, 2012
I have many surfaces overlapping and I want to create one surface with the lowest elevation for each x,y coordinate from the existing surfaces. Does autocad civil 3D have a command for this?.
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Aug 11, 2013
I have a database containing more than 5000 parcels. each parcel have its set of points with their labels, and for each parcel I have to generate a drawing. Is there an algorithm for placing point labels inside the polygon of the parcel with minimum overlapping ?
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Aug 21, 2012
In highway construction, I usually check for lowest ditch elevation and see how the existing drainage flows. Typically one would create or specify in CL profile creation with a 15m offset right and left which would then generate existing CL and 15m offset profiles in profile view. However, the 15m offset profile might not represent the lowest point in the ditch as the lowest elevation offset distance varies along the highway.
My question: Is there a way in civil 3D profile creation where it can automatically trace the lowest elevation in the ditch and plot it in profile view?
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May 15, 2013
is there a way to connect the lowest points of each cross section, for a series of cross sections, and possibly make a pline or feature line in plan view?
Civil 3D 2013 SP1, Win 7-64 bit
12GB RAM
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Mar 5, 2013
for a long time i want to know this.
i want to create edges/vertex inside a polygon and i want to know how to connect edges/vertex to each other..
i don't know how to do this.
whan i click on the create button in the Edit Poly panel and then try to create edge so it is not create it Inside the polygon..
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Sep 20, 2011
How would I go about this. if a two blocks or polygons are overlapping area?
A good method or the algebraic formula for a function to tell me if a point is inside a polygon or block's area?
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Apr 30, 2013
One of my colleagues was able to insert Spot Elevations by picking anywhere on the surface of his floor objects in his floor plan yesterday (2013 Central file with two users working). Today, when he tries to place the same Spot Elevation object, he is only able to pick the floors at the perimeter of the floor objects instead of the surface of the floor. what setting or mode they accidentally changed to prompt this unfortunate behavior?
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Jul 11, 2013
I am trying to create an elevation label that will give me the spot elevation followed by the letters "TC" and then on the line below subtract 4 inches from the elevation followed by the letters "BC". It's easy enogh to add the letters but the simple equation of elevation - 4 inches eludes me.
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Dec 19, 2012
When I snap a point to an object, the point takes on the elevation of the object. I would rather the point's elevation stay as is.
-changing osnapz variable
-latest civil 3d service pack
A few weeks ago I did not have this problem but once my computer was switched to the company's global server and c3d was reinstalled the problem appeared. Furthermore (post switchover), when a colleage of mine prepared a simple test drawing with just a line and a point, he was able to snap to that line without the point changing elevation. When he sent that drawing to me and I tried snapping the point to the object, the same problem occured with the point taking the elevation of the line object. I suspect it is a system variable issue
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Apr 16, 2012
i have some existing drainage pipe and structures in a base plan that i need to change the invert (which is the easy part) and the top elevation to the existing top elevation that does not meet the minimum presect in civil 3d 2012 is there a way to change these min. to match my exisitng elevation for example i have a catch basin invert is 15.45 top is 17.56 with a 18" rcp the cover will be less than 12" and i need to change this.
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Aug 15, 2013
Is there a setting for extruding polygons so it doesnt leave the original polygon.
When i extrude a polygon into a 3D solid, it extrudes fine but it also keeps the original polygon which means i have to delete it?
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Oct 14, 2013
There are many examples of creating rectangular patterns, but not many, if any, of interrogating existing patterns.I have attached the files and a screenshot of a rectangular part inside an assembly. The part contains a rectangular pattern of holes and workplanes.how do I get hold of each proxy of the workplane in the pattern?In other words I don't know what to put in the for loop at the end of this code fragment:
If _invApp.Documents.Count = 0 Then MsgBox("Need to open an the assembly document") ReturnEnd If If _invApp.ActiveDocument.DocumentType <> DocumentTypeEnum.kAssemblyDocumentObject Then MsgBox("Need to have an Assembly document active") ReturnEnd If Dim asmDoc As Assembly Document asmDoc = _invApp.ActiveDocument Dim asmDef As AssemblyComponentDefinition asmDef = asmDoc.ComponentDefinition im occurrences As ComponentOccurrencesoccurrences.
[code]....
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Jun 24, 2013
I have a polilyne and need create table data for coordinates and lengh, exist some command for this
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Mar 8, 2013
Is there anyway to change a rectangular Mview to a polygon one. I have all the text and call outs and now the engineer wants to blank out everything behind the match lines. I will probably never make a rectangle mview again.
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Nov 24, 2013
Is there a way to define object data to a polygon or a poly line in C3d? I imported a shape file and saw that in the properties dialog box the object data of the polygons is displayed. I would like to define create new polygons and define certain atrributes to it before exporting it as a shape file. This would would eliminate the need to use a GIS program to define the attributes of the polygons.
Im using PCSWMM and would like to define certain atributes to polygons and polylines in C3D before i import it in to PCSWMM.
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May 23, 2013
I've made a shape (attached image) and am trying to find a way to use it for a linetype. However, I'd like to have the left and right "blocks" filled (hatch or whatever) so that when used repeatetively in a linetype, the filled and open spaces will alternate. I may change it to be only 2 blocks or 4 - haven't decided yet.
I've made linetypes with simple line shapes, but never one like this.
I have exported the 3 polygons through the Map Drafting ribbon --> Export and then brought it back into CAD. This gave me 3 adjacent filled polygons (3 seperate objects) and I don't know how to show it as one shape entity, much less without the middle fill.
Is there another way I can accomplish this without the use of shapes?
Civil 3D 2012
Windows 7 Enterprise SP1
Dell Precision T3400
(Q9550 @ 2.83 GHz)
8GB RAM
Nvidia Quadro GTX 650 Ti BOOST
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Jun 1, 2012
I want to know is a point(for example p1) is on the right of an alignment?
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Nov 29, 2013
I have made a 3D model of a frame for my work; when I try to add in the dimensions I cannot find the dimension between for example one horizontal line (in front view) and one vertical line. And sometimes when I manage to click on the two lines, it says "the lines are parallel".
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Nov 29, 2012
I am having some difficulty figuring out how to get the extents to a civil 3d label object. I want to be able to select a label, and draw a custom polyline around it (in dragged state) and draw a leader or multiple leaders from that new polyline. I just can't seem to figure out how to get at the label data itself.
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Dec 20, 2013
I went out with our GPS and shot each of our stock piles we have in our yard (recycle asphalt, 3/4" gravel, 1" gravel, etc.), and now I want to figure out how much of each pile we have
So what I did was create a seperate surface for each pile, then I created a volume surface for each as well and just set the base and compare surface as the existing, that wat was I can get the total sq ft of each pile, but now I want to figure out how much yards of material are in each pile
Would I need to set up a materials list for each on to calc how much are in each pile according to what type of material they are?
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Jul 16, 2012
I'm running Civil 3d 2010
I have opened a drawing created by someone else and see that it is loaded with data shortcuts and they all seem to be working properly and displaying fine. The problem is that I would like to add some more shortcuts to the project yet I cannot find the folder where they are located on our server. I have opened up source drawings for every one of them and there are no data shortcut folders located in the same path as the source drawings nor in my project file. They have been stored miscellaneously somewhere on my server. I have tried searching by name (*.xml) for the data shortcuts on my server but the names are too generic and I get to many hits to locate the one I need. Is there any way to list a data reference and the program tell you the folder where it is getting it from?
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Mar 27, 2012
we got cad files from an older survey done for a realtor. Everything was in pretty bad shape, with blocks everywhere. Since then the drawings have been cleaned up significantly. But I am having issues with two line types referencing a .shx file we don't have. The line types will not come out in a purge or manual delete efforts. I tried to do a filter by linetype but it continues to feed back 0 selected. I am wondering if the line types are used in a block definition that isn't drawn anywhere on the screen.
Is there a way to determine what linetypes are used in what blocks? Ultimately once the lines that use the two linetypes are located they will be changed to a different one and purged out of the drawing.
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Jan 24, 2013
I'm looking for solution for this error: Mask '0' NOT added to corridor surface 'Corridor - (1) - (1)' as boundary due to crossing polygon.
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Mar 23, 2012
Is it possible to create user defined data fields that can be attached to a polygon. then be able to export the polygon and data fields to ArcMap
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Feb 18, 2013
where I can download standard USGS hatch patterns for identifying differnet strata in geologic columns. I know the USGS has standard patterns for specific strata and I was looking for a .pat file that has them all in it.
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Jun 26, 2012
Is there a surface setting / style option where contour labels (elevations) will display at some specified interval as part of the surface rather than going through and adding them as labels afterwards? Seems like a rudimentary operation, where the labeling can be so scattered and random.
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Aug 21, 2013
I need to rough in a drainage pipe network that connects several structures around a site. The pipe inverts need to be 6.5' below the finished floor of each unit and must maintain a minimum 2% slope. The network needs an outfall at some undetermined point on the site. The pipes must follow some existing roads, so they are not interconnected directly to each structure.
How can I go about determining the potential outfall locations?
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Jan 20, 2012
How i can take off or remove the message "finding exterior borders". This appear in the left bottom corner of Civil 3D.....it makes that my computer is very slow...
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