Hi PTodd2,
Based on my research, LocateAlongGeog is included in SQL Server Spatial Tool which is a third-party tool. In this case I would say you may need to develop some CLR user defined function for it. Correct me if I’m wrong, is
this the function you are looking for? In the meantime, I would suggest you review
BOL for the method you could use for SQL Geography.
If you have any other questions, please let me know.
Regards,
Lin