This report documents the development of three major products: (1) a Los Angeles County Dual Independent Map Encoding (DIME) File to which community college district boundaries have been special area coded; (2) a book-like listing of all house number ranges and street names and the college district and census tract they are found in; and (3) a bound map-atlas of census blocks and census tracts on which the current boundaries of community college districts in Los Angeles County are traced. The use of the DIME File and appropriate computer software to review the addresses of student applicants and determine whether they reside in the college district is discussed. Appendixes provide an example of Census Tract and Census Block Coding, an Example Coding Sheet, Copies of Corresponsence, and a Street Spelling Standardization Form. (DB)