How to read the map?

[Corinthian]

There are 3 different types of rectangless from the "sector?" view. Orange outline but empty means no one ones them, orange solid means you own them and Dark purple means someone else owns them.
What we really could use is some indication to tell us if we are looking at an outpost or a colony with population... wasted several of my fleets on ice planets people decided to colonize... not cool.