Multiple Area Report

David Cazabat
David Cazabat
in Other
Good afternoon all,

Does anyone know if there is a way to do the following listing with Bricscad V13.

Input:
A layer containing thousands of polygons (Closed Polylines)

Output:
A report of all polygons with two columns with the following format:     Polygon Area | Polygon Centroid

Thanks





Comments

  • Kevin Simmons
    Kevin Simmons

    David,

    I have created a lisp routine that reports the  area and perimeter lengths of multiple polygons in a drawing to an excel file for another client. I would have to add functionality to calculate and report the centroid of the polygons also, but I think it is something that can be done fairly easily. I would need a sample dwg for an example of exactly what you want.

    Thanks,

    Kevin

    kysurveyor3635@bellsouth.net

  • Rakesh Rao
    Rakesh Rao

    Hi David,

    If you are willing to consider a third-party commercial app, you may want to try our CADPower productivity pack for BricsCAD which has this and 250+ more tools for various .dwg processing.

    Look here for more info: www.coordsys.com/cadpower

    Best Regards
    Rakesh Rao
    Smarter .dwg CAD

  • Sakko
    Sakko

    .......Input:   A layer containing thousands of polygons (Closed Polylines)
    Output:  A report of all polygons with two columns with the following format:     Polygon Area | Polygon Centroid


    Hi David
    here is a lisp routine to do this by following the steps :
    1.  Convert all your polygons to Regions by using the command REGION
         (before converting set the variable DELOBJ =0 to keep the original polygons or DELOBJ =1 to erase them during the conversion)
    2   Load the attached Lisp file  ExPro2CSV.LSP using the APPLOAD command and call the command ExPro2CSV (Export Properties to CSV file ...comma delimited)
         ...select the regions and there you are !
    You get a comma delimited file like the CSV2.txt which can be imported to Excel for further treatment
    I have also included the Handle , a unique identification code for every Region, in case you want to link somehow the
    Excel file with the original entities , e.g.  import a text for every region etc.

    HANDLE,AREA,CENTROID-X,CENTROID-Y,CENTROID-Z
    278,84542.963,1918.276,2070.479,0
    279,231599.661,2412.821,2189.495,0
    27E,568337.902,1976.304,987.31,0
    27F,280746.444,1327.07,1475.396,0
    280,368903.737,1587.83,2034.549,0

    Enjoy !

    CSV2.txtExPro2CSV.LSP

  • Sakko
    Sakko
    i have just minimally improved the flow of logic in the function  Get_Handle_Area_Centroid ....!
    just use the new one !

    ExPro2CSV.LSP

  • David Cazabat
    David Cazabat
    Hello Konstantin,

    Thank you for your LISP.
    Unfortunately the REGION command is not available for the Classic version of Bricscad.
    So I cannot run your LISP.

    My polygons are made of 3D polylines.

    Thanks for your help



  • Roy Klein Gebbinck
    Roy Klein Gebbinck
    Note that 3D polylines do not have an area. You would have to project the vertices onto a plane first and then calculate the area.
  • Sakko
    Sakko

    ...
    Unfortunately the REGION command is not available for the Classic version of Bricscad.
    So I cannot run your LISP. My polygons are made of 3D polylines.
    .....


    Hello David,
    this is an important information that your polygons are 3D polylines.
    This means that you don't have any arc segments in your polygons.
    In this case it is possible to calculate the centroid of a polygon without converting it to a Region.
    I used the free routine provided by Mac-Lee at     http://www.lee-mac.com/polygoncentroid.html
    As Roy says 3D polylines do not have an area so they have to be converted to 2D LWPOLYLINES...
    I have reworked the routine to this end, so now you can select  3D Polylines and 2D LWpolylines and get a list of centroids into a file.
    The newly created lwpolylines identical to the 3D ones are not deleted so change the active color before you run the routine
    so that you can select and delete them easily afterwards.
    I hope this helps !
    You find the routine attached and a test file i used

    3Dpol2CSV.dwgExPro2CSV-2.LSP

  • Rakesh Rao
    Rakesh Rao

    Dear Guys,

    Back to the CP_CALCAREA command on CADPower, we have made some significant improvements based on general feedback received from users. Creating a table of centroidal coordinates, area, units conversion, are all part of the CP_CALCAREA command now.

    See attached UI.

    Best Regards
    Rakesh Rao
    Smarter .dwg CAD

    imagecalcarea_dlg.GIF
This discussion has been closed.