LandXML Import

I read that LDD does not export breaklines in LandXML. I have attached a pdf of an article I got somewhere talking about exporting from LDD to InRoads. Hope it helps. Otherwise I use the 3d Breaklines from the DWG and import surface from graphics. Many times people have told me they could send me the 3D faces but that makes for a large surface.

The PDF is ~15. MB

The imported surface from XML should give you the exact same triangluation as in the orginal surface model in Land Desktop. Therefore you would not need the breaklines to have an accurate surface. If you do need the breaklines for some other reason you might need to go back to the source for a CAD file with the breaklines.

Most LDD projects, if created properly, contain the breaklines also.  If so, follow the procedure to export the fault lines from LDD, then import the .flt file using the IR text import wizard.  Then assign symbologies to the features as needed.  This is the best option.

Neil is correct that you get the exact same triangulation using LandXML, however the dtm file size can be 10 times as big (and much slower to load) since you are triangulating triangles instead of triangulating breaklines; not to mention losing out on the power of a dtm using features and styles.  I only do this as a last resort if no breaklines were provided. HTH.

Chris

Most LDD projects, if created properly, contain the breaklines also.  If so, follow the procedure to export the fault lines from LDD, then import the .flt file using the IR text import wizard.  Then assign symbologies to the features as needed.  This is the best option.

Neil is correct that you get the exact same triangulation using LandXML, however the dtm file size can be 10 times as big (and much slower to load) since you are triangulating triangles instead of triangulating breaklines; not to mention losing out on the power of a dtm using features and styles.  I only do this as a last resort if no breaklines were provided. HTH.

Chris