I have some spatial data stored in SQL database geometry column called sp_geography (The field is defined as Geometry). The SQL below:
f.sp_geography.STLength()
returns, for example 0.0895991008150951 when I was expecting 892.9m and 0.00175496077867079 when I was expecting 132.6m
I believe it is returning decimal degrees but I cannot workout how to convert to metres. How can I retun the result in metres?