Working with Linked Topography

You can use linked topography in many of the same ways that you can use topography created in Revit.

To link topography to your model, click Insert tabLink panel (Link Topography).

Using linked topography in the model

One topography link may include multiple surfaces. You can treat each surface separately.

You can do the following with the linked topography surfaces:

• Assign a different phase to each surface.
• Display the topography in a view, and place it on a sheet.
• Create a section view that cuts the topography. Display poché below the surface.
• Specify contour settings and display contour labels on the topography.
• Place building pads and site components on the topography.
• Place railings on the topography. They follow its surface.
• Create subregions and assign materials to them.
• Add spot dimensions (such as spot elevations and spot slopes) to a surface.
• Include topography data in a schedule.

Note:

• Place building pads or subregions on a single surface. They cannot span multiple topography surfaces.
• For linked topography, you can use the Subregion tool. However, you cannot use these tools: Split Surface, Merge Surfaces, and Graded Region.

Visibility and graphics for linked topography

You can control the visibility and graphics of linked topography as follows:

• Visibility/Graphics: Use the Visibility/Graphics dialog to control the display of the topography in each view. For example, you can display or hide the topography, change its graphics, and more. In a 2D view or a 3D view, on the Visibility/Graphics dialog, click the Model Categories tab, and expand the Topography category to turn visibility on or off, and to define graphics settings.
• Assign a material to the topography.
  Topography elements do not support surface patterns assigned to materials.

Managing linked topography

To manage topography links, use the Manage Links dialog.

• Reload: When you reload a topography link, all hosted elements are restored to the topography surface. For example, railings and building pads remain in their respective positions on the surface.
  If a reloaded surface has changed so that a hosted element is no longer positioned on it, a warning displays so you can investigate and correct the issue. If some surfaces in the reloaded topography no longer exist, you see a list of the deleted surfaces.
• Reload from: Use this option to reload a topography link from another location.
• Remove: If you remove a topography link, the elements that it hosts are also deleted. A warning dialog indicates how many elements are affected. Expand the list to see element details. To avoid deleting the hosted elements, cancel the Remove operation.