Names and codes
In mongolmaps: Maps and Administrative Boundaries of Mongolia and Ulaanbaatar

knitr::opts_chunk$set(collapse = TRUE, comment = "#>")

library(mongolmaps)

Mongolian place names are written in many ways: Khovsgol, Khuvsgul, Hovsgol, Khövsgöl or Хөвсгөл are the same aimag. mongolmaps gives every unit one code and knows its other names.

The codes

pcode is unique across all levels:

| Unit | pcode | NSO code | ISO 3166-2 | |---|---|---|---| | Mongolia | MN | 0 | MN | | Western region | MNR1 | 1 | | | Khovd aimag | MN84 | 184 | MN-043 | | Jargalant soum (Khovd) | MN8401 | 18401 | | | Ulaanbaatar | MN11 | 511 | MN-1 | | Bayangol district | MN1107 | 51107 | | | Bayangol, 1st khoroo | MN110751 | 5110751 | |

pcodes match the humanitarian Common Operational Dataset (COD) and are the NSO codes without their leading region digit. mn_codes() lists them all:

mn_codes("aimag")
mn_codes("bag", within = "Baganuur")

Bags and villages (tosgon) have codes and names but no public boundary (has_geometry is FALSE).

Matching names

mn_match() turns names or codes into pcodes (or any other column):

mn_match(c("Khuvsgul", "Hovsgol", "Kh\u00f6vsg\u00f6l", "\u0425\u04e9\u0432\u0441\u0433\u04e9\u043b", "MN-041", "267"))
mn_match(c("MN84", "MN8401"), to = "name_mn")

It ignores case, punctuation and words such as "aimag", "province", "soum" or "district" -- but uses them as hints when a name is shared:

mn_match(c("Sukhbaatar", "Sukhbaatar district", "Sukhbaatar soum"), within = c(NA, NA, "Selenge"))

Small typos are matched and reported:

mn_match("Ulanbaatr")

When a name is shared by several units, mn_match() returns NA and says which ones; add within to choose:

mn_match("Bayan-Uul", level = "soum")
mn_match("Bayan-Uul", level = "soum", within = "Dornod")

Transliteration

mn_translit() romanises Cyrillic with a fixed table:

x <- c("\u04e8\u0432\u04e9\u0440\u0445\u0430\u043d\u0433\u0430\u0439", "\u0421\u04af\u0445\u0431\u0430\u0430\u0442\u0430\u0440")
mn_translit(x)
mn_translit(x, to = "nso")

The default is the national standard MNS 5217:2012; to = "nso" gives the plain-ASCII spellings used in NSO English tables.