Converting SHP Contour to 3D CAD Layer

There are several ways to convert SHP Contour to 3D CAD layer. First is by using the ArcGIS 3D Analyst extension. Layer contour in the shp format are converted into 3D using the facilities available in 3D Analyst. Then the result (the default file name his dddfeat1.shp) on the import of AutoCAD (Map). Here are the stages of the process:
  1. 3D Analyst -> Convert Features to 3D 
  2. Determine the input features, and define the source of heights. The value of the layer elevation contour shp file formats found in the attribute, for that select the input feature attribute select field name that has the elevation value. By default the file name conversion result is dddfeat1.shp.
  3. The converted files (dddfeat1.shp) then the import of CAD programs. Open AutoCAD (Map), from the Map menu -> Tools -> Import
  4. From the opened Import window, navigate to the drive / folder where the file is stored dddfeat1.shp. Make sure the Files of type is ESRI Shape. Click OK
  5. See the picture above, click on the column writing data. You will fill in the source elevation value on the open window as shown below. Select Create Data Object, and click the Select Fields.
  6. On Mapping Data Object window as shown below, select the fields that will be used as input. Click OK
  7. Zoom to extents to see the contours of the conversion. To see the elevation contours, select a contour line, see its properties (right click).
The second way, is much more simple, by using the Global Mapper software. Open the file in a format shp contour, then from the File menu -> Export Vector Data-> Export DXF.


From the opened DXF Export Options window, make sure you check the option 'Create Feature Using 3D Elevation Data Loaded'. Click OK, save the file name you want.


Now you have a 3D file DXF format that can be opened in the AutoCAD program.

Credit: Inigis.com
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