如何使用C＃/ SQL Server 2008空间“平均”两个或更多地理线串

Suppose I've got a set of results from a study into the behaviour of a particular migratory bird. The bird has been tagged, and a GPS receiver records the migration path it follows each year over a five year period. The results are stored in a SQL Server table that contains one geography linestring for each year's path.Suppose I've got a set of results from a study