Geopak equivalent to InRoads DTM

Anthony:

Your basic understanding is correct.  The closest GEOPAK equivelent to a DTM is a TIN file.  But a TIN file is simply a surface.  The difference is that an InRoads DTM file stores the features for the elements whch comprise the surface so it contains the information to distinguish an edge of pavement breakline from a stream breakline (for example).  This is a simplified explanation for which some of my Bentley collegues can expand if necessary.

If you could please elaborate on it. Is there anyway to duplicate the InRoads DTM in Geopak...or export Geopak information with the feature intelligence to InRoads? We use Geopak, but need to supply an InRoads DTM file and do not InRoads.

An InRoads DTM is comprised of features which are a group of points with a name, style and point type. The name is the unique identifier for the surface feature. The style controls where the feature can display (Plan, Profile, Cross Section) and is also linked to a named symbology which controls the element attributes when displayed in MicroStation-styles and symbologies are stored in the .xin. The feature points are connected with triangles to form a complete DTM. Every feature also has a point type ie. Breakline, Interior, Exterior, Random. When a Surface is created from a corridor in the Roadway Designer, then the proposed DTM will also contain components, which can be displayed as shapes in cross section from which volumes are computed and/or displayed as 3D elements in plan view (i.e. curbing, sidewalks and pavement)

HTH

-V

Are you trying to create a existing or proposed DTM?

I'm trying to export our proposed Geopak information (via tin file, 3D file, breaklines, something...) to create a proposed InRoads DTM that have those feature identifiers.