tigris (version 0.5)

tribal_block_groups: Download a Tribal block groups shapefile into R.

Description

From the US Census Bureau: "Tribal block groups are subdivisions of a tribal census tract. Tribal block groups were defined by federally recognized tribal government officials in the Census Bureau's Tribal Statistical Areas Program (TSAP) for the 2010 Census. If a tribal government declined to participate in TSAP, the Census Bureau delineated tribal block groups on the American Indian reservation and/or off-reservation trust land (ORTL). Tribal block groups are intended to generally contain between 600 and 3000 persons or between 240 and 1200 housing units. Many American Indian reservations and ORTLs have less than the minimum population thresholds for more than one tribal block group and in those cases one tribal block group was delineated that covers the entire American Indian reservation and/or ORTL. Unlike standard block groups, the cluster of blocks that comprises each tribal block group will not necessarily begin with the same first number of their 4-character census block number, but may contain blocks from several different standard census block groups." For more information, please see the link provided.

Usage

tribal_block_groups(year = NULL, ...)

Arguments

year

the data year (defaults to 2015).

...

arguments to be passed to the underlying `load_tiger` function, which is not exported. Options include refresh, which specifies whether or not to re-download shapefiles (defaults to FALSE).

See Also

http://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2015/TGRSHP2015_TechDoc.pdf

Other native/tribal geometries functions: alaska_native_regional_corporations, native_areas, tribal_census_tracts, tribal_subdivisions_national

Examples

## Not run: ------------------------------------
# library(tigris)
# library(leaflet)
# 
# trib <- tribal_block_groups()
# leaflet(trib) %>%
#   addProviderTiles("CartoDB.Positron") %>%
#   addPolygons(fillColor = "white",
#               color = "black",
#               weight = 0.5)
## ---------------------------------------------