Precinct Types:
RG = Original Registration Precincts (created by County Registrar of Voters)
RR = Registration Precincts (ceated as part of the SWDB merging process)
SV = Original Voting Precincts ( see 1.)
SR = Consolidated Precinct ( see 2.)
Precinct Conversion File Types:
| Alpha Indicators | Precinct Conversion Capability |
| PB | 1990 Census Blocks => SR |
| PC | 1990 City => SR |
| PD | RR => SR |
| PE | 1990 City => RG |
| PF | 1990 City => RR |
| PG | RR => RG |
| PR | RR => SR |
| PS | SR => RG |
| PT | SR => RR |
| PU | RR => SV |
| PV | SV => SR |
| PW | [SR => RR ; SR => RG] |
| PX | RG => RG (cross election) |
| PZ | SR => SR (cross election) |
Definitions:
RG = Original Registration Precincts (designated by County Registrar)
RR = Registration Precincts (designated by Pac Tech Data Research)
SV = Original Voting Precincts (designated by County Registrar)
SR = Consolidated Precinct (designated by Pac Tech Data Research)
1990 City = City Area (designated by US Census Department)
1990 Census Blocks = Census Blocks (designated by US Census Department)
1990 Census Tracts = Census Tracts (designated by US Census Department)
"Cross Election" = moving between election years, i.e. from 1994 geography to 1996 geography
Other Conversion File Types:
| Name | Conversion Capability |
| RR-G92-BL-C90_AD##.CNV | RRG92 => 1990 Census Blocks |
| RR-G92-BL-C90_CY##.CNV | RRG92 => 1990 Census Blocks |
Naming Convention: "origin unit"-"election and year" -"destination unit"_"coverage".CNV
Definitions:
"##" = wildcard symbol
1990 Census Blocks = Census Blocks (designated by US Census Department)
RR = Registration Precincts (designated by Pac Tech Data Research)
These are links to pages explaining "Geographic Hierarchy for the 1990 Decennial Census" and "Small Area Census Geography in the 1990 Census." These pages were drawn from the Geographic Area Reference Manual, Chapter 2, pages 7 and 9. This document is available on the census website at www.census.gov.