Package: OPCC 1.0.1

Lennon Li

OPCC: Open Postal Code Correspondence

An open, fully reproducible alternative to closed postal code conversion files, giving source-qualified many-to-many correspondence between Ontario postal codes and Statistics Canada 2021 census geographies. Every published artifact can be rebuilt step by step from public sources using the included build functions, so any user can reproduce and audit the conversion end to end. Lookup results retain allocation weights, evidence source, lineage, method, and vintage; unmatched postal codes remain explicit, and versioned release artifacts are checksum-verified before use. A built-in 'shiny' application provides a point-and-click interface for joining, mapping, and exporting results. Correspondences are derived from the Statistics Canada National Address Register <https://www150.statcan.gc.ca/n1/pub/46-26-0002/462600022022001-eng.htm>, the 2021 Census Geographic Attribute File <https://www12.statcan.gc.ca/census-recensement/2021/geo/aip-pia/attribute-attribs/index-eng.cfm>, and the GeoNames postal code export <https://download.geonames.org/export/zip/>. The package does not redistribute Canada Post, PCCF, or PCCF+ data and does not claim authoritative postal assignments.

Authors:Lennon Li [aut, cre, cph]

OPCC_1.0.1.tar.gz
OPCC_1.0.1.zip(r-4.7-any)OPCC_1.0.1.zip(r-4.6-any)OPCC_1.0.1.zip(r-4.5-any)
OPCC_1.0.1.tgz(r-4.6-any)OPCC_1.0.1.tgz(r-4.5-any)
OPCC_1.0.1.tar.gz(r-4.7-any)OPCC_1.0.1.tar.gz(r-4.6-any)
OPCC_1.0.1.tgz(r-4.6-emscripten)
manual.pdf |manual.html✨
DESCRIPTION |NEWS
card.svg |card.png
OPCC/json (API)

# Install 'OPCC' in R:

install.packages('OPCC', repos = c('https://lennon-li.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/lennon-li/opcc/issues

On CRAN:

4.60 score 28 exports 2 dependencies

Last updated from:9f30bbb991. Checks:9 OK. Indexed: yes.

Target	Result	Time
linux-devel	OK	153
source / vignettes	OK	219
linux-release	OK	152
macos-release	OK	103
macos-oldrel	OK	102
windows-devel	OK	90
windows-release	OK	90
windows-oldrel	OK	94
wasm-release	OK	116

Exports:aggregate_da_correspondence build_centroids build_db_assignment build_m2 build_source_layer clear_opcc_cache contribution_bundle contribution_issue_url download_census_boundaries download_da_boundaries download_gaf download_geonames download_nar export_postal_points geonames_supplementary_adapter get_correspondence get_da_correspondence list_vintages new_source_adapter normalize_postal_code open_contribution_issue pc_to_geo pc_to_point profile_source_layer release_manifest run_app validate_release validate_source_data

Dependencies:digest jsonlite

Using OPCC

Rendered fromusing-opcc.Rmdusingknitr::rmarkdown

Last update: 2026-09-11
Started: 2026-07-20

Help page	Topics
Aggregate postal-code-to-DB evidence to DA links	aggregate_da_correspondence
Build Ontario postal code centroids from NAR and GeoNames	build_centroids
Assign postal centroids to Dissemination Blocks and join GAF	build_db_assignment
Build the M2 postal-code-to-DB correspondence	build_m2
Build a source-separated local evidence layer	build_source_layer
Clear the downloaded OPCC release cache	clear_opcc_cache
Create a reviewable local-source contribution bundle	contribution_bundle
Create a GitHub source-proposal issue URL for a contribution bundle	contribution_issue_url
Download Statistics Canada 2021 census boundary shapefiles	download_census_boundaries
Download Statistics Canada 2021 dissemination area boundary files	download_da_boundaries
Download the Statistics Canada 2021 Geographic Attribute File	download_gaf
Download GeoNames Canadian postal codes	download_geonames
Download the Statistics Canada National Address Register	download_nar
Write a postal-code point shapefile for an OPCC join	export_postal_points
Load the versioned GeoNames supplementary-point adapter	geonames_supplementary_adapter
Download, cache, and verify a correspondence release	get_correspondence
Download, cache, and verify a direct DA correspondence release	get_da_correspondence
List supported correspondence release vintages	list_vintages
Define a source adapter for a local evidence layer	new_source_adapter
Normalize Canadian postal codes	normalize_postal_code
Open Postal Code Correspondence	OPCC-package OPCC
Open a GitHub source-proposal issue for a contribution bundle	open_contribution_issue
Look up postal-code-to-geography links	pc_to_geo
Look up source-qualified point observations	pc_to_point
Profile a local source layer	profile_source_layer
Read and verify a release manifest	release_manifest
Launch the OPCC Shiny app	run_app
Validate a verified correspondence release	validate_release
Validate local postal-code evidence	validate_source_data

Package: OPCC 1.0.1

OPCC: Open Postal Code Correspondence

Citation

Development and contributors

Readme and manuals

Help Manual

Usage by other packages (reverse dependencies)