Why have we mapped stuff in 2 cone shapes only?

Our Sun is located in the disk of the Milky Way Galaxy. The dust, gas, and stars of the Milky Way block our view in the plane of the Galaxy and close to it, so we can see clearly only north and south of the galactic plane, hence the two cone shaped areas we have mapped in detail.

The two cones represent what we've mapped, the empty spaces between those cones have not been mapped.

i comprehend it quite is unusual yet final summer season i met an entire new bunch of people by way of human beings watching i sat interior the gardens on the city, and watched human beings, in basic terms doing their standard issues, of course be careful, i met some fantastic weirdos, yet in addition alot of extreme-high quality people who might in basic terms communicate to me concerning the climate or something stupid, and then save on walking. i in basic terms like watching human beings, in case you take a seat for some hours, that's interesting, even though it ought to easily be me.