convert a DTM in a .DWG format in a .TIN format in Arcgis

[Pierre-LouisDescreux]

Hi everyone,

I need the help of the GIS community for a question related to TIN.  I have a DTM created with Covadis. My topo points are connected with triangle 3D face.

Now, I would like to obtain exactly the same DTM but in a .TIN format in Arcgis (I would like to avoid to re-create an entire TIN in Arcgis as the work was already done in Covadis). I'm pretty sure there are easy ways to do it, but as I'm a GIS-beginner, I don't really know how to do it...^^

Here are all the software I have: Autocad Map 3D 2011, Covadis 11, Arcgis 10.1 and Autocad Cicil 3D 2017

Thank's to all of you for your help!!

[DanPatterson_Retired]

the only direct tin import can be found here LandXML To TIN—Help | ArcGIS for Desktop and cad tools are found here CAD to Geodatabase—Help | ArcGIS for Desktop if the TIN is properly constructed, then you should be able to recreate it from a Delaunay triangulation from the input points which apparently you don't want to do Fundamentals of TIN triangulation in ArcGIS—Help | ArcGIS for Desktop