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Reads the GeoEPR - Geo-referencing Ethnic Power Relations data

Source: R/data_geoEPR.R
read_geoepr.Rd

Downloads and processes GeoEPR (Geo-referencing Ethnic Power Relations) data, which provides spatial information on politically relevant ethnic groups and their settlement areas worldwide. The function formats temporal variables and adds utility columns for temporal analysis compatible with PRIO-GRID.

Usage

read_geoepr()

Value

A sf object

Details

GeoEPR combines the Ethnic Power Relations (EPR) dataset with geographic information to map politically relevant ethnic groups' settlement patterns. This function:

  • Downloads the GeoEPR dataset from the ETH ICR data repository

  • Converts temporal variables (from, to) to proper Date objects (gwsdate, gwedate)

  • Adds a date_interval utility column for temporal operations

  • Filters out geometries with empty spatial information

  • Returns data in sf format for spatial analysis

References

Wucherpfennig J, Weidmann NB, Girardin L, Cederman L, Wimmer A (2011). “Politically Relevant Ethnic Groups across Space and Time: Introducing the GeoEPR Dataset.” Conflict Management and Peace Science, 28(5), 423–437. ISSN 0738-8942, 1549-9219, doi:10.1177/0738894210393217 , 2024-10-21. Vogt M, Bormann N, Rüegger S, Cederman L, Hunziker P, Girardin K (2015). “Integrating Data on Ethnicity, Geography, and Conflict: The Ethnic Power Relations Data Set Family.” Journal of Conflict Resolution, 59(7), 1327–42. 2024-10-21.

See also

pg_dates for PRIO-GRID temporal coverage, st_sf for sf object details

Examples

if (FALSE) { # \dontrun{
# Read GeoEPR data
geoepr_data <- read_geoepr()

print(geoepr_data)

# Check available columns
names(geoepr_data)

# View temporal coverage
summary(geoepr_data$gwsdate)
summary(geoepr_data$gwedate)

# Filter to specific time period
modern_groups <- geoepr_data[geoepr_data$gwsdate >= as.Date("2000-01-01"), ]

# Examine unique ethnic groups
unique_groups <- unique(geoepr_data$group)
head(unique_groups, 10)

# Filter to specific country (example: using country code)
# country_groups <- geoepr_data[geoepr_data$gwid == 2, ]  # Example for USA

# Plot ethnic group settlement areas
plot(sf::st_geometry(geoepr_data), main = "Ethnic Group Settlement Areas")
} # }