id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc
1286,"ST_MakeLine and ST_MakePolygon that makes a circularstring, curvepolygon",robe,pramsey,"This stack exchange post got me thinking.

http://gis.stackexchange.com/questions/16712/st-makeline-equivalent-for-circularstring-in-postgis

We have similar issues I think with ST_Collect as far as POLYHEDRALSURFACES are concerned.

Lets say you have a set of points that define the points of a CIRCULARSTRING, there is no aggregation routine we have that allows you to say these points are curve control points, not linear points.

e.g.  I have p1,p2,p3,p4,p5 .. pn points and I want to aggregate to form a circularlinestring composed of CIRCULARLINESTRING(p1,...pn)

I propose we overload ST_MakeLine to take an optional argument that allows you to pass in CIRCULARLINESTRING, but that defaults to LINESTRING.

Same issue with ST_MakePolygon -- we just assume someone wants to make a POLYGON from the points not a CURVEPOLYGON.


Same issue with ST_Collect -- When you collect polygons you might be collecting to form a MULTIPOLYGON or POLYHEDRALSURFACE

since an ST_Dump(polyhedralsurface) generates polygons",enhancement,closed,medium,PostGIS Future,postgis,trunk,duplicate,,