Binary district spatial-weight matrices — spatial

Symmetric, unstandardized integer matrices for 2020. w_mat_YYYY combines exact Queen adjacency with documented marine road bridges and subsea tunnels open by December 31 of that year. w_mat_o_YYYY contains exact Queen adjacency alone.

Usage

w_mat_2020

w_mat_o_2020

Format

Square 250 by 250 integer matrices. Values are 0 or 1, the diagonal is zero, and dimnames are five-digit SGIS ADM2 codes.

An object of class matrix (inherits from array) with 250 rows and 250 columns.

Source

SGIS/KOSTAT boundaries; Ministry of Land, Infrastructure and Transport, local government and National Archives facility records.

Details

Rows follow adm2_sf_2020, not sorted code order. Align observations by code before analysis. The 2010, 2015 and 2025 versions are registered in tidycensuskr.sf, with their corresponding boundaries.

Parallel facilities between the same districts contribute one edge. Within-district facilities contribute no diagonal entries. Ordinary inland river bridges, dykes, railway tunnels and facilities opening after the cutoff are not added. Marine bay and estuary crossings are included. Islands may have zero neighbors; row standardization is left to the user.

Exact Queen adjacency uses sf::st_touches() with no snapping tolerance. The 2020 coverage has no polygon overlaps. Unresolved historical contacts are documented with the repair artifacts. These matrices represent the supplied geometry plus the researched transport inventory, rather than a guarantee of complete real-world connectivity.

The connection inventory and code-order metadata are distributed under system.file("extdata", "spatial_weights", package = "tidycensuskr.sf").

Examples

data(w_mat_2020)
data(adm2_sf_2020)
stopifnot(identical(rownames(w_mat_2020), as.character(adm2_sf_2020$adm2_code)))