Distribution, in the ﹩g-r-z-W1﹩ color–color planes, of three of the morphological model types from DR7. The PSF type (left panels) corresponds to unresolved sources, which include stars, distant QSOs, and some unresolved galaxies. The EXP and DEV types (middle and right panels respectively) are sources that are best fit by exponential disk or de Vaucouleurs ﹩{r}^{1/4}﹩ light profiles. All colors are in units of AB magnitudes.