Galactic Open Clusters and the LOCS Project

Based on a most complete open clusters sample with metallicity, age and distance data as well as kinematic information, some preliminary statistical analysis regarding the spatial and metallicity distributions of the Milky Way disk is presented. In particular, a radial abundance gradient of -0.058 +/- 0.006 dex/kpc was derived, and by dividing clusters into age groups we show that the disk abundance gradient was steeper in the past. For the overall gradient along the disk, from our data, a continuous linear gradient is more favorable. Based on the great advantages of the forthcoming LAMOST facility, we have proposed a detailed open cluster survey program with LAMOST (the LOCS). The aim, feasibility, and the present development of the LOCS are briefly summarized.