This quick video-tutorial shows how to painlessly import elevation data from grid format (.tiff, .asc, .hgt etc.) to CAD software, such as Rhino and Revit. We will be using open source QGIS software to make conversions and send data to Speckle. Rhino and Revit Speckle connectors will then import proper 3-dimentional contours into your project.

Go beyond interoperability: Speckle is an open source data platform for the AEC (architecture, engineering, construction) industry.

Information on file-based worksharing in Revit on Dropbox, Box, OneDrive, SharePoint, or Google Drive

Update******************************************************* August 2018************************************************** Enough time has time passed since the original 2011 posting that I think it is important to update things based on where we are in 2018. First, don't do this method for Workset enabled projects. The downside and likelihood of it failing is too great to justify it. And it will fail at some point. Probably two hours before a deadline and you've now lost several hours