Michigan Dept. of Transportation ACT51 maps through 1999 ( ACT51 maps are annually updated maps created by the MDOT for the purpose of allocating federal highway funds.)
The USPS Michigan ZIP+4 State Directory Copyright 2000
Qualified Voter File project (QVF) maps begun in 1997. (The QVF is a Department of State (DOS) program that manages Michigan's registered voters. The program requires all county, city, township, and village clerks to provide updated and added street, voting precinct, school district and jurisdiction information directly on maps provided by the Center for Shared Solutions and Technology Partnerships.)
This source information listed was compared with 1992 and 1997 Michigan State University created aerial photographs as well as 1992-2000 USGS Digital Ortho Quad Photos to resolve conflicts between the framework geography and the Michigan Department of Transportation (MDOT) Michigan Accident Location Index (MALI).
The above source information was used to create Versions 1a and 1b. Framework Version 2a, was improved by using the United States Geological Survey (USGS) 1:12,000 Digital Ortho Quarter Quad (DOQQ) aerial photography to reposition all the named roads in each county. The DOQQs were produced in 1992-1999.
Framework Version 3b was reconciled to the 2001 Act51 maps.
Changes incorporated in version 3b of the MGF are described in the following document:
MGF_v3b_Updates
Framework Version 4, has been reconciled to the 2002 Act51 maps.
Changes incorporated in version 4 of the MGF are described in the following document:
MGF_v4b_Updates
Changes incorporated in version 5a of the MGF are described in the following document:
MGF_v5a_Updates
Changes incorporated in version 6b of the MGF are described in the following document:
MGF_v6b_Updates
Changes incorporated in version 7b of the MGF are described in the following document:
MGF_v7b_Updates
Changes incorporated in version 8a of the MGF are described in the following document:
MGF_v8a_Updates
Changes incorporated in version 9b of the MGF are described in the following document:
MGF_v9b_Updates
Changes incorporated in version 10a of the MGF are described in the following document:
MGF_v10a_Updates
Changes incorporated in version 11a of the MGF are described in the following document:
MGF_v11a_Updates
Changes incorporated in version 12b of the MGF are described in the following document:
MGF_v12b_Updates
Changes incorporated in version 13a of the MGF are described in the following document:
MGF_v13a_Updates
Changes incorporated in version 14a of the MGF are described in the following document:
MGF_v14a_Updates
These and other documents related to MGF can be found at: <http://www.michigan.gov/cgi/0,1607,7-158-12759_14194---,00.html>