Configure settings for exporting a model to an Industry Foundation Classes (IFC) file. To customize setup properties for exporting a model to IFC, modify the "In-Session Setup " option or duplicate a built-in setup and modify the settings as required.

Confirm the level type setting of elevation base are all the same. (Site survey point or project base point )Link this DWG file to the SUPER MASTER at DATUM level and using center to center, make sure the unit set-up are correct, and link at project north.

This makes sense because the topography contains contours which are a certain level above sea level or Australian Height Datum . I would like to know that when setting up the levels for the proposed project on the site, is it best practice to move the Project Base point up to the desired level of the building and then change the contours elevation base to be set to "survey point " (see below) and then draw layers at the desired height?

The project base point and survey point were well inside the limits of the model.

So, you want to check which Link levels are monitored AND which levels were, at one point in time, monitored in the Project.

In the following dialog, if you don't see that parameter listed, click "Add..." and match the setup I've shown in the image below.

BasePoint A class representing the Project Base Point and Survey Point . Each Revit project contains one project base point and one survey point .

You can check in UI the below by drawing a detail line along the edge and dimensioning from grid to end points . In terms of end user interaction I think typically for these kinds of things notifying is better than correcting i.e.