These county-based reference maps show and label the state legislative districts and/or voting districts (the geographic entities that the states submitted during their participation in the early phases of the Census Redistricting Data Program). The maps also show the boundaries and names of American Indian areas, Alaska Native areas, Hawaiian home lands, states, counties, county subdivisions, and places. Additionally, these maps display a base feature network including roads, railroads, and water bodies. These features are labeled as map scale permits. The map sheet configuration is optimized to keep the number of map sheets for each county to a minimum. Each county is covered by one or more parent map sheets at a single scale. Inset map sheets at larger scales were created where there are clusters of voting districts and/or state legislative districts that cannot be identified at the parent map scale. An index map showing the sheet configuration is included for all counties requiring more than one parent map sheet. The map sheet size is 36 by 32 inches.
Each set of VTD/SLD reference maps is accompanied by a VTD to Map Sheet relationship file and an SLD to Map Sheet relationship file. These semi-colon delimited text files include a record for each VTD or SLD within the county, consisting of the code and name of the district and a list of all map sheet numbers that the district appears on.