Masao, are you the person who made this really great map?
I saw it the other day and really admire the work that went into it...
Yes, I did that about 10 years ago when I first started my mapping experiments. It's pretty but not very practical for showing the relationships between stars. Perspective is useful for showing objects that we are familiar with, but with stars all you get is a bunch of dots. Routes give the stars a bit of structure, but there's too much overlap in a least one dimension.