The ROAD project provides MCD-group map files in Arcview 2.0 format. (Boundry files do not exist for all electoral precincts in the U.S.) These files can be read into Arcview version 2.0 or later (or converted into other formats) and merged with the MCD-group level data allowing political and demographic variables to be easily mapped. Arcview requires three types of files to create these maps (.shp, .shx, and .dbf). The ROAD project provides these three types of files at the MCD-group level for each state. The files follow the naming convention sumXX.shp, sumXX.shx, and sumXX.dbf, where XX is a two letter state abbreviation. Instructions for merging these map files with MCD-group level data in Arcview 2.0 follow.
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