get_irreversible_municipality_mutations: Get irreversible municipality mutations

In SMMT: The Swiss Municipal Data Merger Tool Maps Municipalities Over Time

Get irreversible municipality mutations

Description

This function detects irreversible mutations.

Usage

get_irreversible_municipality_mutations(mutations)

Arguments

mutations

A tibble with municipality mutations (as created by import_CH_municipality_inventory)

Details

Irreversible mutations are defined as mutations during which territories are split up. There are different types of irreversible mutations drawn from the below cited document. In contrast, normal mutations signify a simple merging of territory which accounts for most of the mutations in Switzerland since 1960 whereas irreversible mutations occurred only rarely. The aim of this function is to filter for these irreversible mutations. These can then be treated separatly.

Definitions for different types of territory split ups are based on: Erläuterungen und Anwendungen - Historisierte Gemeindeverzeichnis der Schweiz (2017).

Value

A tibble with all the instances of irreversibe mutations. The irreversibility cause is part of the output.

Examples

  mutations <- structure(list(hist_id = c(11320L, 13668L, 13669L),
 district_hist_id = c(10024L, 10024L, 10024L),
 kanton_abbr = c("AG", "AG", "AG"),
 bfs_nr = c(4061L, 4061L, 4084L), 
 name = c("Arni-Islisberg", "Arni (AG)", "Islisberg"), 
 admission_nr = c(1000L, 1481L, 1481L), 
 admission_mode = c(20L, 21L, 21L), 
 admission_date = structure(c(-3653, 4748,  4748),
 class = c("Date")), 
 abolition_nr = c(1481L, NA, NA), 
 abolition_mode = c(29L, NA, NA), 
 abolition_date = structure(c(4747, NA, NA),
 class = c("Date")), 
 change_date = structure(c(4747, 4748, 4748),
 class = c("Date"))), 
 row.names = c(NA, -3L), class = c("tbl_df", "tbl", "data.frame"))
   
irreversible_mutations <- get_irreversible_municipality_mutations(mutations)

SMMT documentation built on April 4, 2022, 1:07 a.m.