Skip to contents

Distance to nearest UCDP GED event within each country

Source: R/data_ucdp.R
ucdpged_distance_within_country.Rd

For each PRIO-GRID cell, computes the distance (in meters) to the nearest UCDP GED conflict event that occurred within the same country during the period containing measurement_date. Cells in countries with no recorded events are set to NA (not 0), to distinguish absence of events from proximity to events. Events with spatial precision code >= 6 (national-level or coarser) are excluded.

Usage

ucdpged_distance_within_country(
  measurement_date,
  ged = read_ucdp_ged(),
  cshp = read_cshapes(),
  config = pg_current_config(),
  geodesic = NULL
)

Arguments

measurement_date

A single Date object specifying the measurement date.

ged

An sf object containing UCDP GED data. Defaults to read_ucdp_ged().

cshp

An sf object containing CShapes 2.0 boundary data. Defaults to read_cshapes().

config

A pg_config object. Defaults to pg_current_config().

geodesic

Logical or NULL. If TRUE, computes distances in WGS84 using spherical (S2) geometry and reprojects the result to the config CRS. If FALSE, uses Euclidean distances in the config CRS. Default NULL auto-detects: geodesic for projected CRS (e.g. UTM), native for geographic CRS (e.g. WGS84, which terra already handles geodesically).

Value

A SpatRaster with distances in meters to the nearest conflict event within the same country. NA indicates no events recorded in that country for the period.

See also

ucdp_ged for fatality-count rasters, read_ucdp_ged for loading raw UCDP GED data