Summary of the visual classification process. Extended sources were classified as elliptical galaxy (MT=1), spiral galaxy (MT=5), undefined galaxy (MT=10), and doubtful galaxy (MT=88). Furthermore, the environments were classified as follows: isolated galaxy (E=0), a galaxy in the company of a close companion (E=2) and a galaxy situated in a dense environment, where at least eight extragalactic sources are visible (E=4).