Overview
The PCCF+ is a SAS control program and set of associated datasets derived from the PCCF, a 2021 postal code population weight file, the Geographic Attribute File, Health Region boundary files, and other supplementary data. PCCF+ automatically assigns a range of Statistics Canada standard geographic areas and other geographic identifiers based on postal codes.
PCCF+ differs from the PCCF in that it:
- Uses population-weighted random allocation for many postal codes that link to more than one geographic area.
- Options are available for institutional postal codes.
- Procedures are included to link partial postal codes to geographic identifiers where possible.
- Problem records and diagnostics are provided in the program output, along with reference
information for possible solutions.
The geographic coordinates, which represent the standard geostatistical areas linked to each postal code on the PCCF, are commonly used to map the distribution of data for spatial analysis (e.g., clients, activities).
In April 1983, the Geography Division released the first version of the PCCF, which linked postal codes to 1981 census geographic areas and included geographic coordinates. PCCF+ was first created using the 1986 census and has been updated regularly with population weight files calculated for each census from 1991 through 2021.
Purpose of PCCF+
The purpose of the PCCF+ is to provide a link between six-character postal codes produced by the Canada Post Corporation (CPC), standard 2021 Census geographic areas (such as dissemination areas, census subdivisions, and census tracts) produced by Statistics Canada, and supplementary administrative areas and neighbourhood income quintiles.
Postal codes do not respect census geographic boundaries and so may be linked to more than one standard geographic area, or assigned to more than one set of coordinates. Therefore, one postal code may be represented by more than one record. The PCCF product, produced by Statistics Canada, provides links between postal codes and all recorded matches to census geography.
PCCF+ uses the PCCF but provides additional functionality in that it uses a population-weighted matching process for some residential postal codes where more than one geographic code is possible. PCCF+ also provides routines for institutional postal codes and for historic postal codes.
The postal codes are linked to the geographic areas used in the 2021 Census of Population. The reference date for these geographic areas is January 1, 2021. The previous version (7E) linked to the 2016 Census of Population geographic areas.
The PCCF+ Version 8A includes a population-weighting file calculated from the 2021 Census population counts
Neighbourhood income quintiles and deciles have been calculated from 2021 Census population data.
The routine that allowed geocoding of historical postal codes in British Columbia (V1H, V9G, prior 1998) has been removed. (2023-03)
From Statistics Canada 2023-07-13
Two errors in PCCF+ 8A were identified and corrected in PCCF+ 8A1. The details are as follows:
Error1: Neighbourhood Income variables Version 8A erroneously used median individual income to calculate the single person equivalent variables. This error impacted the following variables (BTIPPE, ATIPPE, QABTIPPE, QNBTIPPE, DABTIPPE, DNBTIPPE, QAATIPPE, QNATIPPE, DAATIPPE, and DNATIPPE) in the GEOREF21.SES21.txt and geo_sesref.sas7bdat files.
Version 8A1 corrected this error by using median household-level income. Compared to Version 8A, about 40% of quintiles had the same classification and 100% of quintiles had the same classification +/- 1 category. Similarly, about 25% of deciles had the same classification and 100% of deciles had the same classification +/- 1 category. The above comparisons are representative of both the national and CMA quintile and decile rankings
Error2: Truncation of the 2016 Dissemination Area Version 8A erroneously truncated the 2016 Dissemination Area (DA) code (DA16UID) in the GEOREF21.GAF21.txt and geo_gaf21.sas7bdat files. Version 8A1 corrected this issue and updated the GEOREF21.GAF21.txt and geo_gaf21.sas7bdat files to ensure accurate and complete 8-digit representation of the DAs.
It is recommended to use PCCF+ version 8A1 (2023-07-28) |