igr 1.0.1

• ig_to_igr() and st_irishgridrefs() return Irish grid reference of NA for empty geometries, and raise a warning (#14).
• Documentation updated to remove legacy tmap code.

igr 1.0.0

• ig_to_igr() no longer appends separators when converting to 100 km resolution Irish grid references (#13).
• Documentation refinements.
• Package considered feature complete and API stable: lifecycle promoted to “stable”.

igr 0.2.0

• All functions now support tetrads (2 km squares, also known as “DINTY” system, e.g. “N85H”) (#3).
• igr_to_ig() and st_igr_to_ig() can (optionally) return centroids of Irish grid references (#8).
• All functions have additional hardening against invalid parameters (#5).
• README & vignette refinements including compatibility with latest development version of tmap 4.0.0 (#4).

igr 0.1.1

• Description extended and vignette build technique adjusted for CRAN compatibility.

igr 0.1.0

• Initial CRAN submission.