plvdkey.exe is a program, written for the project by ROAD Team Member Kenneth Benoit, that takes a list of precincts and their corresponding MCDs, and assigns a new number to each: that of the MCD Group. The basic objective of plvdkey.exe , therefore is to find the smallest common units of precincts and MCDs below the level of county. Because MCDs are generally larger than precincts, an MCD Group sometimes contains a single MCD and several precincts--a relatively common pattern of sub-county organization. Many counties, then, have some coincidence of MCD and precinct boundaries. Other counties, however, have MCDs which correspond in no way to precinct boundaries. In these cases, the smallest common unit boundary simply becomes the the county.
| Copyright © 1997-2004 | [ROAD Home] | Questions? Contact the ROAD webmaster. |