This PR attempts to resolve both #15 and #16 by replacing the concrete type Mixed to an abstract type MixedFormatMode, and adding Extended and Unknown for the the cases where we know we have both CRS and Geom, or we do not know the contents and let convert try to resolve conversions with heuristics later on.
This should mean we don't need ExtendedWellKnownText or EWKT, as we have WellKnownText{Extended}.
This PR attempts to resolve both #15 and #16 by replacing the concrete type
Mixedto an abstract typeMixedFormatMode, and addingExtendedandUnknownfor the the cases where we know we have both CRS and Geom, or we do not know the contents and letconverttry to resolve conversions with heuristics later on.This should mean we don't need
ExtendedWellKnownTextorEWKT, as we haveWellKnownText{Extended}.