tongfen v.0.3.8

Breaking changes

• get_tongfen_ca_census now honours its base_geo, na.rm, tolerance, crs and data_transform arguments, all of which were silently ignored. Most visibly, the documented default base_geo = NULL now returns data without geographic information, where previously the geography of the first dataset was returned. Pass base_geo to get an sf object back
• removed the area_mismatch_cutoff argument from get_tongfen_ca_census and get_tongfen_correspondence_ca_census, it never had any effect. Use check_tongfen_areas to inspect area mismatches, keeping in mind that geographies for different years are simplified independently and differ in how water features are cut out ## Major changes
• correspondence tables are now built via a vectorised connected components pass instead of a row-by-row union-find, which makes tongfen on large geographies dramatically faster (dissemination blocks for a large province: minutes down to seconds)
• the “statcan” method no longer downloads census geometries it does not use
• dissolving geometries skips regions that don’t need to be merged
• new get_tongfen_correspondence_us_census to get correspondence tables for US census geographies without also fetching the data
• US census tract correspondence tables now reach back to the 1990 census (dec1990). The Census Bureau has retired the 1990 API endpoint, so 1990 data itself has to be brought in separately, for example from NHGIS, and combined via tongfen_aggregate
• US county subdivisions can now be matched across the 2010 and 2020 censuses, previously only the 2000 and 2010 censuses were available
• US correspondence tables no longer chain regions together over slivers. The Census Bureau relationship files list every geometric overlap, including boundaries that only shifted slightly, and matching those up merged unrelated regions into one common geography. The new min_area_share argument controls how much area two regions have to have in common to count as related, default is 0.01, and no region is ever dropped. This gives substantially finer common geographies, for Rhode Island tracts across the 2010 and 2020 censuses 198 instead of 60, for Vermont 151 instead of 26 ## Minor changes
• get_tongfen_us_census gained a sumfile argument, passed through to tidycensus, either a single value for all censuses or a vector named by dataset. Without it 2020 data is read from the PL 94-171 redistricting file, which carries almost no variables
• get_tongfen_correspondence_ca_census gained a crs argument for the spatial intersections, default is 3347 (Statistics Canada Lambert)
• missing geographic identifiers no longer merge unrelated regions into one common geography
• fix crash when tongfen-ing census tracts across non-adjacent censuses
• fix get_tongfen_census_ct, get_tongfen_census_da and get_tongfen_ca_census_ct_from_da erroring out when called with geo_format=NA
• fix 2020 US census tract identifiers getting stripped of their leading zeros when read from the relationship file, which silently dropped most tracts out of the result. For Rhode Island 246 of 250 tracts were affected
• US county subdivision data now errors out up front on censuses it can’t be matched across, instead of failing with “Did not find matching geographic identifiers” after downloading the comparability file and the census data
• fix proportional_reaggregate ignoring all but the first base variable when base names a different variable per category, which silently weighted every category by the same variable
• fix estimate_tongfen_correspondence with method="identifier" erroring out when every geographic identifier matches and there is nothing left to estimate geometrically
• fix tongfen_tag_largest_overlap emitting a tibble name repair deprecation warning
• estimate_tongfen_correspondence and get_tongfen_correspondence_ca_census now error out with a clear message when handed fewer than two geographies
• no longer trip the tidyselect deprecation warning for .data in select() and rename()
• functions relying on the suggested cancensus, tidycensus and readxl packages now check that they are installed and give an actionable message instead of failing deep in the call
• fix the duplicate check in tongfen_aggregate only looking at the first geographic identifier when matching over several
• cache directories for US data are now created recursively, so a nested options(tongfen.cache_path=...) works
• faster check_tongfen_areas and aggregate_correspondences

tongfen v.0.3.7

Major changes

• accommodate factors in proportional_reaggregate
• sizable performance increases
• squish several edge case bugs

tongfen v.0.3.6

Major changs

• better downsampling that can also accommodate averages
• performance improvements ## Minor changes
• better documentation
• allow for datasets vartiables by census year for canadian data
• fix issue where some metadata might get duplicated

tongfen 0.3.2

• Fix compatibility issue with changes in {sf} package
• More reliable GitHub action CRAN checks

tongfen 0.3.2

Major changes

• Added tongfen_estimate_ca_census function for new CensusMapper endpoint, tying into new {cancensus} functionality. ## Minor changes
• Custom impelementation of tongfen_etimate for finer control
• Fix compatibility issue with changes in {sf} package

tongfen 0.3

Major changes

• Initial release