Hipparcos data. However, all the data is located close to the black cross which marks the position of our Sun in the Milky Way. Our position in the Milky Way is about 8200 parsec or roughly 27000 ly away from the galactic center.
On the left side you see a blowup of the region of the Sun, where I used the new Hipparcos catalogue (van Leeuwen, 2007) to draw the positions of more than 100000 stars (white dots). Hipparcos measured the positions of stars better than one milli-arcsecond, which means the most distant stars in this catalogue are more than 3000 ly away. Of course, most of the observed stars are much closer to the Sun; 90 % of the stars with measure distances are within a radius of 1660 ly.