Double or decimal for latitude/longitude values in C#

Question

What is the best data type to use when storing geopositional data in C#? I would use decimal for it\'s exactness, but operations on decimal floating point numbers are slower

Answer 1

Double

Combining the answers it is how Microsoft represents it itself in SqlGeography library

[get: Microsoft.SqlServer.Server.SqlMethod(IsDeterministic=true, IsPrecise=true)] public System.Data.SqlTypes.SqlDouble Lat { get; } Property Value SqlDouble A SqlDouble value that specifies the latitude.