3 Replies Latest reply on Nov 5, 2010 4:08 PM by contrms

    Exporting 3D Contour Lines from GIS to 3D CAD format files

    svandijk
      I am requesting from our GIS department to have 3D contour lines exported from ArcGIS into a usable 3d Cadd file.   I was hoping to use them in either Autocad or MicroStation (*.dgn, *.dwg, or *.dxf)

      Not being an ArcGIS user, is this even possible?  If it is possible, does anyone have any step by step instructions on "How To".
        • Re: Exporting 3D Contour Lines from GIS to 3D CAD format files
          jakubsisak
          They can be exported directly to DXF or DWG from ArcGIS.
          • Re: Exporting 3D Contour Lines from GIS to 3D CAD format files
            erice-esristaff
            Go to ArcToolbox > Conversion Tools > To CAD > Export to CAD.  Here is a link to the documentation for this tool.

            http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00120000001n000000.htm

            Regards,
            Eric
            • Re: Exporting 3D Contour Lines from GIS to 3D CAD format files
              contrms
              Go to ArcToolbox > Conversion Tools > To CAD > Export to CAD.  Here is a link to the documentation for this tool.

              http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00120000001n000000.htm

              Regards,
              Eric


              Eric,
              I do not use ArcGis but depend on getting contour lines in .dxf format for use in OCAD.  OCAD is a program to make maps for oreinteering.  We work with the local county GIS (PeoriaGIS) to get the contours in .dxf format.  They sent us files earlier this year and they were fine.  Last month they did the , I quote "The exact same thing" and the files do not work.  The contours come out as polylines but they do not have field 38 which is the elevation of the contour line.  We have also gotten contours in .dxf format from two local cities and both of these had the correct format. 

              Here is an extract from the file that worked

              Extract from Jubilee file:
              ##########################
              AcDbPolyline
              90        <- The Number of Vertices flag
                    583 <- The Number of Vertices flag

              70
                   0
              43
              0.0
              38       <- The Elevation flag
              612.0     <- The Elevation Value
              10       <- The X Value Flag
              2386302.028874598  <- The X Value Flag
              20 <- The Y Value Flag
              1517499.999887429 <- The Y Value
              10
              2386301.690949522
              20
              1517501.495912425
              10
              2386299.30808254
              20
              1517504.652094021
              10
              2386296.49115454
              ###########################

              This is an extract from the file that did not work.  Notice no 38 field

              Extract from the Wildlife Prairie Park File
              ###########################
              AcDbPolyline
              90
                    234
              70
                   1
              43
              0.0
              10
              2412105.140975837
              20
              1480678.342197761
              10
              2412106.589463755
              20
              1480678.551514924
              10
              #############################

              I spoke with the city that gave us the good data this week and tried to talk the local county guy through it and got the same 2D data with no elevation.

              I wrote him and he responded

              "Mike,

              I do not have a great deal of knowledge about CAD data, but I can tell you
              from looking at the DXF and DWG files in ArcCatalog, that a field called
              "Elevations" is populated with elevation data.  There is also a field called
              "Elevation" that does not have any values.  Will the "Elevations" field
              containing the elevation data work for your purposes?  I double-checked my
              work in exporting the data to CAD format, and the result was the same as the
              data that we delivered to you."


              Any idea on what he is doing?  We need to get a bunch more maps and the county is the only source.

              Thanks!

              Mike C.