How can you convert or save an InRoads DTM surface to a Civil 3D TIN, or any other civil design software so the surface can be utilized in different programs?
We do not have a direct way to write the coding of the Civil3D TIN, but we do have a translator which is a universal standard for data transfer between Civil Softwares. This process is also used for converting the InRoads DTM to a format that can be imported into GEOPAK, various Data Collectors, machine controls, etc.
In InRoads, go to File > Translators > LandXML Translator
Go to the 'Export Surface' tab.
Select the Surface you wish to export
Select the information you wish to include (Triangles, Features, Non-triangulated Features)
Select the units
Select the Source State (Proposed, Existing, etc.)
Save As - This allows you to save the file out as an XML file.
You can now provide this *.XML file to the Civil 3D user and they will have the ability to import the XML through their LandXML Translator.