Extract Coordinate from Event Sub-Block

Given a sub-block of GEDCOM lines corresponding to an event (e.g., birth or death) and a coordinate tag ("LATI" or "LONG"), this function searches all lines in the sub-block for the first occurrence of the tag as a whole word. This approach allows it to find coordinates regardless of whether they are direct children of the event, nested under a "PLAC" structure, or nested under a "MAP" structure within "PLAC". If a matching line is found, it extracts the coordinate information using the `extractInfo()` function; otherwise, it returns `NA_character_`.

Usage

extractCoordFromSubBlock(sub_block, tag)

Arguments

sub_block

A character vector of GEDCOM lines representing the sub-block of an event (e.g., birth or death) from which to extract the coordinate.

tag

A character string representing the coordinate tag to look for ("LATI" or "LONG").

Value

A character string with the extracted coordinate information from the first matching line, or `NA_character_` if no matching line is found.