Glad to hear you have been able to work with PostgreSQL vectors. Regarding other things: 3 - Neither Manifold 8 nor Radian override projection information if it is provided in the data. Augment with local scales / local offsets - yes, compose from different pieces of disjoint data - yes, but not override. It is just that sometimes the projection is not provided (or, say, our code cannot understand it). That's when Manifold 8 assigns the default projection and asks you to set it / confirm that you are OK with the default. i ll expect a geom in input and a epsg in output but find not this kind of signature in the query builder !!
Geometry values no longer store coordinate system data in Radian, that info is stored in component properties. This is a change from Manifold 8. 4 - I guess you are asking about CoordConverterMake. This function takes a source coordinate system, a target coordinate system, and creates a converter object that can be used to convert coordinates from the former to the latter - with functions like CoordConvert. 5 - You can work with user types in PostgreSQL from Radian / Viewer using the PostgreSQL query engine. You can intermix statements sent to the PostgreSQL query engine with statements ran on the Radian query engine in the same query using EXECUTE [[ ... ]], for example.
|