Revit Topography and Site Modeling 3 — Questions and Answers
Question 1: In a Revit site plan, which setting controls the interval at which contour lines are displayed on a toposurface?
- Additional Contours interval in Visibility/Graphics Overrides
- Contour Line Spacing in the toposurface properties
- Site Settings contour interval under Manage tab (Correct answer)
- Contour Display under the View Properties dialog
Correct answer: Site Settings contour interval under Manage tab
The contour interval for toposurfaces is set in Manage > Additional Settings > Site Settings, where you define primary and secondary contour intervals.
Question 2: A Civil engineer exports a site survey as an ADSK file. What Revit workflow should be used to incorporate this data?
- Use 'Link Topography' to import the ADSK file as a linked toposurface (Correct answer)
- Import the ADSK as a CAD file and trace contours manually
- Use 'Insert > Import CAD' and select the ADSK format
- Convert the ADSK to a point cloud before importing
Correct answer: Use 'Link Topography' to import the ADSK file as a linked toposurface
Revit's 'Link Topography' command (Site Designer) imports ADSK files from Civil 3D or InfraWorks as a linked, updatable toposurface.
Question 3: What is the effect of setting the 'Room Computation Height' to 0 on a level near a toposurface?
- Rooms are computed at the level's elevation, which can cause issues if the toposurface intersects the level (Correct answer)
- Room areas are excluded from all schedules
- The level becomes a datum only and cannot host rooms
- Rooms expand vertically to fill the entire building height
Correct answer: Rooms are computed at the level's elevation, which can cause issues if the toposurface intersects the level
A computation height of 0 means rooms are measured at the level plane itself; if the toposurface intersects that plane, room boundaries may be inaccurate.
Question 4: Which Revit Site component family category is used to place objects like trees, shrubs, and parking spaces on a toposurface?
- Site (Correct answer)
- Planting
- Generic Model
- Entourage
Correct answer: Site
Site component families (category: Site) include elements like parking spaces and light poles, while Planting is the category for vegetation.
Question 5: When linking a point cloud to Revit for toposurface creation, which command generates the toposurface geometry from the cloud data?
- Toposurface > Create from Point Cloud (Correct answer)
- Insert > Link Point Cloud, then Edit Toposurface
- Massing & Site > Toposurface with Point Cloud source selected
- Annotate > Tag All, then extract elevation data
Correct answer: Toposurface > Create from Point Cloud
After linking a point cloud, use the 'Create from Point Cloud' option within the Toposurface command to sample points and generate surface geometry.
Question 6: A Revit toposurface subregion is assigned a paved material. In which view will the material appear rendered?
- A 3D view with Visual Style set to Realistic or in a Rendered image (Correct answer)
- Any floor plan view with Detail Level set to Fine
- Only in section views that cut through the toposurface
- Elevation views with Override Graphics applied
Correct answer: A 3D view with Visual Style set to Realistic or in a Rendered image
Material rendering on toposurface subregions is visible in Realistic visual style in a 3D view or after running Revit's Render command.
Question 7: How can you display the true elevation of a specific point on a toposurface without placing a spot elevation annotation?
- Hover over the point in Edit Toposurface mode to see the elevation in the status bar (Correct answer)
- Use the Measure tool between the point and a datum plane
- Apply a filter to the toposurface and read the property value
- Place a reference plane at the point and check its offset
Correct answer: Hover over the point in Edit Toposurface mode to see the elevation in the status bar
In Edit Toposurface mode, hovering over an existing point displays its X, Y, Z coordinates in the Revit status bar at the bottom of the screen.
Revit Topography and Site Modeling 3
In a Revit site plan, which setting controls the interval at which contour lines are displayed on a toposurface?