AutoCAD Map 3D :: Creating Topology To Determine Soil Type And Acres Of Parcels Of Land
Nov 18, 2013
I have downloaded the SSURGO file from Web Soil Survey. They are in .shp files, I have imported the spatial files into AutoCad Map 3d 2012. My goal is to create a Topology so that I can detemine the soil type and acres of parcels of land.
When I click on the polygon in my drawing it is a closed polygon with double line or overlapping lines and it does has object data but it is part of the line not a point as I am used to.
I have a known outer boundary for my depo for excess soil. I know how much (volume wise) is going in to the depo. I know that the slope is 1:2.
I do not know where the upper boundary (top of the depo) of the depo is. That's what I would like to find out.
I know that I can create a upper boundary with a feature line and then use the grading and volume tool in order to find out at what height the upper boundary is placed. But then the outer boundary is either too small or exceeds the known boundary.
What is the easiest way of finding out where the upper boundary is? I am thinking about drawing a feature line around the known boundary on top of the EG surface and then using stepped offset. Then I can check out the volume.
But is it possible to do this automatically instead of manually?
Lets say, I have an Extrude feature built on a Rectangle as Sketch Profile. Is it possible to programmatically edit that Sketch, add one line in the middle dividing the Rectangle and replay the Extrude, so that I get Rectangular solid and a Partition surface in between?
This was not possible as a user, but programmatically if its allowed to turn ON some Non-Manifold flag and allow this. If allowed, this probably may not be a single Extrude feature doing both Solid and Surface, but could split into 2 Extrudes.
Is there a way to determine the type of ACAD object that the user selected? I need to retrieve the value from either a dimension or text. The info could be in either format so the lisp routine needs to determine what was selected so the correct vla-get command is used.
Once I determine what the object is I can use an if statement to retrieve the value.
;user selects the object (setq dimobj (vlax-ename->vla-object(car(entsel)))) ;If ACAD object is a dimension do this. (setq dimvalue (vla-get-textoverride dimobj)) ;If ACAD object is text do this. (setq dimvalue (vla-get-textstring dimobj))
Is it possible to insert a formula or is there an existing expression I could use to calculate area in acres from a General Overall Length line label if I input the width?
I am wondering if there is a way to modify the Map Check Report to include Acreage Calculations like it used to. I am only given the square feet and need both. I know I can calculate it easily, but it would be nice if it were there by default.
I was wondering how to plot various soil profiles on a 3D Model of a deep excavation site. I've plotted the exterior of the area, borehole to borehole, using AutoCAD Civil 3D 2012. The problem I'm facing is that when I start plotting the layers of the different soils, say from borehole 1 to borehole 2, it ends up protruding from the face of the distance from borehole 1 to borehole 2. I'm not sure of how to make sure the plot is on a fixed axis, like y-z axes, to ensure I have a reference point. How can I go about this?
We have a client who is looking to dispose of a large quantity of excess soil on a vacant property. We plan to hold the elevations near the northern property line, slope 2% in a southerly direction, then tie in at 3:1 slopes along the southern property line. What is the best method to determine where the break point between the 2% and the 3:1 tie grades would be?
I am trying to create a new linetype. It is a simple linetype, made up of a continuous chain of capsules that I've attached here. I understand that linetypes require shape files and line definition files. However, AutoCAD isn't even telling me how to create the shape file(s) I need to begin making the linetype.
The capsule is .12 units long at its widest, and will need to connect end-to-end.
Create a large number of polygons (plines, parcels, whatever) that represent spaces on a building plan
Assign a space number to the polygon
Link the space number to an Excel spreadsheet (or Access DB) so that the characteristics of the polygon (line and fill color, for example) are chosen based on the "owner" of the space (e.g.; Engineering, Common Areas, etc.).
Display a label stating the space number and the space name. Is this best done with "Parcels" in Civ3D, or with "Polygons" in Map, or some other way.
Why cant you extrude a hatch? I am trying to draw soil in 3d and the materials in the 3d library aren't really working for me. I wanted to extrude gravel hatch from 2d material bank.
Is there a way to improve the error of closure of a Parcel. I have one Parcel that has an EOC of 0.0161'. That's a little higher than I like to see. I understand that some of this has to do with the precision of the analysis. But with bearings to the second and distances to the hundredth, I'd like to think we could do better than that.
I suppose that if I changed the POB the closure might improve. But I want the POB to be the closest corner to an existing monument.
was showing it off in class and it's always worked before but now it's not working on any of the computers. Just tried it on my laptop with the same results. I originally thought it was an issue with 2014 but 2013 isn't working either (and I know it was working in the past).
The only thing I can think of is my computer recently upgraded to IE10. Could that be it?
I am trying to detect overlaps between two different features. They are, at the core, shape files from a GIS system and we have AutoCAD Civil 3D 2009.
I have reviewed the steps to test for Topo within a feature but don't know how to test topo between two features. I need to test for and identify "Overlaps" between feature A and Feature B and when Feature A is "Not Entirely Within" Feature B.
I have two set of points with O.D. attached (points_1:data_1 and points_2:data_2). I want each point of the first set get the O.D. of the NEAREST point of the second set. Something like "point overlay". The problem is that AutoCAD Map can't overlay point topologies, and that makes sense, since entities don' t actually overlap.
I have successfully created and defined a topolgy in Map 3D using a Visual Lisp routine that I cobbled together from CREATE.LSP. What I'd really like to do is be able to access that data and create closed polylines and centroids without going through the menu interface. The only documentation that I've been able to find is the Mapping Commands section of the Help file.
I found several commands, but they rely on user input to work. I might be able to work around this by typing a dash before the command line to suppress dialog boxes except for the fact that MAPCLPLINE does not respond to this method.
I noticed in CREATE.LSP that there was a TPM_MTNBUILD command that (apparently) was used to build the topology. Are there similar commands that I just haven't found yet?
Any lisp routine that will remove "phantom parcels" in a drawing? They are the parcels many topics on this discussion forum have topics on, that can be selected but can't be deleted by any simple means.
The drawing is relatively new...with minimal objects in it. Just some Feature Lines and 3D Polylines. I have Sites in my drawing...but no parcels. Only thing in the sites are the feature lines. When I do a Q SELECT for the parcels it selects and highlights my feature lines, which is weird.
Any way to create a parcel from an object (closed polyline) and populate the parcel with Object Data from the polyline?
I have imported a .shp file into a drawing and the result is many closed polylines with properties similar to the attached image. I would like to bring this data into a parcel object for labeling purposes.
Auto cad map 2011...unhanded exception error occurs when I create a large (2500+) polygon topology. In fact, initially I only use acad point for centroids to minimize complexity, until I know the map is clean.. Later, when a topology is assured, I bring in attributes as the centroids. I am only using four layers. Have been doing this for five years...always used acad map 2006 and had no issues. Have had the same problem with all releases after 2008, and was hoping this would be the moment..but it's still the same. Incidentally...I even moved to a 64 bit box,6 gigs of ram and 64 bit 2011version of acad map in the hope that this would go away.. How I regret giving up version 2006.
The attached assembly contains 3 parts modelled in slightly different ways. All parts fail when the dimension of 600 is changed to 200 in the Tool Part, probably because a different face comes into play...but it's the same body.
