Compare with above for feature sets.I mainly just use tiles to get info, ...ie......map.getproperyat(layer, x, y). ...I can then find certain things on maps...getobjectat(x,y) also reworked the objects , as not all objects have width, height.apart from other optimizations..things to do.somehow work out how to link or make a list of the objects which point to their objects in the multi [y] layer.