You may also want to reference BIM for Landscape that was produced by the Landscape Institute in the UK: https://www.amazon.com/BIM-Landscape-Institute/dp/1138796689/ref=sr_1_1?ie=UTF8&qid=1503067601&sr=8-1&keywords=bim+for+landscape
It might help to ensure that the CAD standards work that you are doing today is also preparing your firm for the future.