(Thank you to The Ohio State University Facilities Information Technology Services Team for sharing their BIM Data and Nearmap for the Mesh Data.) Here’s an example of how I georeferenced a Revit file representing a building on the campus of The Ohio State University. Tip: Make sure that snapping is on and set to vertex. Georeferencing is labor intensive, but it only needs to happen once. In georeferencing, the transform information is saved in a WLD3 file for future uses of this model. In this case, the data must be georeferenced. If the model is still not positioned correctly, the geographic location is likely not included in the base point.

If I’ve chosen a correct coordinate system and my Revit model included positioning information in the base point, then my model should be correctly positioned in my scene. The Define Projection tool can be found on the Analysis tab in the Geoprocessing group.Ĭoordinate system units do not match the file units Evaluate Position To assign my chosen coordinate system, I’ll use the Define Projection geoprocessing tool before adding to the map. If the model is in the United States, I’ll usually try a State Plane coordinate system that matches my expected units. If I guess incorrectly, I can refine my choices later.

Do I know roughly where in the world this model is?įrom those two pieces of information, I can make a logical guess of a valid coordinate system to use.

Can I make a reasonable guess whether this model is using metric or imperial units?.

In most cases, I don’t have a way to ask the author about the coordinate system, so I need to make a logical guess.

If I can, I’ll ask the author if this information is included, and if so which coordinate system was used for the base point coordinates. This information is stored with the Revit base point. To select the correct coordinate system, the first question I ask is:ĭoes this Revit model include location informatio n? There are techniques in Revit to include N/S, E/W, and elevation. BIM File Workspace Not Georeferenced Step 1: Assign the Coordinate Systemīefore I add this model to a scene, I’ll need to select a coordinate system to use.

Rvt file viewer