NCP, in partnership with MissionInsite is able to offer your congregation demographic information - so you can understand what is happening outside your walls.  Used in conjunction with the CAT (to assess the community within the church) this tool provides great quantitative information in terms of income, ethnicity, educational levels, etc.  Although not a substitute for on-the-ground work (ask us about how to do a Community Exegesis!), a report of MissionInsite can add insight on how what the needs of a community are.