Contour Lisp Autocad

  1. Contour Lisp Autocad Download
  2. Contour Lisp Autocad
If you need to use a supplied survey data to create a 3D terrain model (DTM) you can sometimes find that the input data are just 2D contours (polylines) without any assigned elevation (Z-coordinate) - just a flat plan view. You obviously cannot directly generate digital terrain model (DTM, topo) from such source data. But a simple LISP utility can simplify generating a terrain model in AutoCAD Civil 3D or AutoCAD.

A sample data can be download from the drawing file LOM.DWG for Civil 3D 2008.

The LISP utility CHELEV (command CHELEV) can easily assign proper elevation (Z) to a set of contours. Just pick two points connecting a line climbing across the contour set and specify the bottom elevation and the contour step. The CHELEV.LSP file can be downloaded from www.cadstudio.cz/download. Load it into AutoCAD e.g. with APPLOAD.

Selection of software according to 'Autocad contour lisp' topic. SketchUp Import for AutoCAD. SketchUp Import 2013 is a free plug-in that offers you two ways to get SKP files into your AutoCAD drawings. You can can add contour lines to a raster-based surface in your map to create a contour or topographic map. You add contour lines to surface layers in Display Manager. To create contour lines In Display Manager, right-click a surface layer, and select Create Contour Layer. In the Generate Contour dialog box, enter a name for the new Display Manager layer that will contain the contour lines. CHELEV.LSP - sets contour elevations (LISP for AutoCAD and Civil 3D) (N.Menu) 1kB:: 1 file(s) listed. Support options on our Support page. Most important part guys Autocad can not create contours! There is no option in plain Autocad. You do though have lots of choices, Autocad CIV3D bring in points as csv and then contour, use a 3rd party product, search here using 'CONTOURS' pretty sure YMG3 can help with a contour routine.

The sample drawing contains an example of countours all placed in the zero elevation, Z=0. There are also pre-drawn sketched segments for specifying the connecting lines for CHELEV and bottom elevations in starting points of these connecting lines. The contour step is 10 (m) in this example.

As you can see in the illustation, the generated terrain model from these 'null' contours (polylines) is initially just a flat surface (you can see just its yellow outline). Use the CHELEV command and specify all 3 necessary connecting lines and their parameters (for monotonous terrains a single connection is enough).

As an automatic terrain ('Surface2') update is preset in this sample drawing - after you set the elevations, the correct 3D terrain model will be automatically generated (see the viewport on the right):

Video-sample:

Beside Civil you can also create the terrain model using the utility DTM for AutoCAD.

Autocad contour lisp free download

Mar 1, 2007 - shallowhead said the following On 3/1/2007 6:50 AM: > Greetings, > I'm looking for a lisp or something to help draw automatic contours based.

AutoLISP Solutions: Create Long Intermediate Terrain Contours 15 Sep, 2005 By: Cadalyst AutoLISP can form an intermediate contour that assumes a linear interpolation between the contour heights Rami Mann e-mailed a request to draw a polyline between two existing polylines representing terrain contours. Onone perfect photo suite 6 keygen crack serial number. His project is missing some contours, and he wants to form an intermediate contour assuming a linear interpolation between the contour heights. The AutoLISP solution is CONTOURS.LSP, which allows the user to select any two polylines (lightweight or 2D) and enter a precision number (default 100) for the number of segments in the resulting polyline. If the terrain changes height rapidly in some places and is flatter in others, then the contours will be close together in parts and may be far apart in other sections (figure 1).

A bonus file I wrote, RPL.LSP, will come in handy to reverse the direction of any selected polyline. Terrain contours with varying distances between them. The lengths of the polylines in figure 1 are about 6,500 units and 5,300 units for the outer and inner contours, respectively. Applying CONTOURS.LSP to the parts of the contours that are somewhat parallel shows better results than those that vary wildly (figure 2). The precision (number of segments) gave good results for anything over 200 but did not improve much between 300 and 2,000.

It took about 1 second for 200 points and about 5 seconds for 1,000 points to generate the curve. A contour generated between two existing contours.

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Contour Lisp Autocad Download

Get the Code Download the files from Cadalyst's CAD Tips site and save them in AutoCAD's Support directory. Use the Appload facility by selecting Tools / Load Application. Then select the CONTOURS.LSP and RPL.LSP programs from where you stored them. How to Use the CONTOURS Code After you load the code, the system prompts you to enter CT to start the program. To see this prompt, you may need to set your Command window size to 3 lines by dragging the Command window splitter bar appropriately. If you are using AutoCAD 2006 and you are not using the Command line area, you can still enter CT to start.

Contour Lisp Autocad

Then AutoCAD will prompt you to select two polylines. How the prompts are displayed will depend on the version of AutoCAD. I tested the code for AutoCAD 2004 and 2006. After you select the polylines, the Precision: prompt is displayed, and you can select Enter to accept the default value shown of 100 points. The intermediate contour is then automatically displayed. It is assumed that the polylines (contours) run in the same direction, so they are logically parallel, and you do not therefore select any particular end of the chosen contours.