rgeo

Currently, our implementation of spherical geometries lack lots of geometric predicates/analysis methods, are inefficient (ex. SphericalLineString#crosses? is O(n^2)), and are unstable when geometries have dense features (#212).

TODOS:

• Change the SphericalMath module to improve stability for feature-dense geometries
• Add more methods to SphericalMath so that we can impleme

In order to determine the properties of a geometry column, the OID::Spatial#parse_sql_type method is called in the SchemaStatements#initialize_type_map method for geometry types. This method parses a sql_type (ex. "geometry(Polygon,4326)") and derives the geo_type, srid, has_z, has_m, and geographic properties from the string.

The problem is that after a join, sql_type comes i