getUSCounty: Return US county name at specified locations

In MazamaSpatialUtils: Spatial Data Download and Utility Functions

Return US county name at specified locations

Description

Uses spatial comparison to determine which county polygons the locations fall into and returns the county name strings for those polygons.

Specification of stateCodes limits spatial searching to the specified states and greatly improves performance.

If allData = TRUE, additional data is returned.

Usage

getUSCounty(
  longitude = NULL,
  latitude = NULL,
  dataset = "USCensusCounties",
  stateCodes = NULL,
  allData = FALSE,
  useBuffering = FALSE
)

Arguments

longitude	Vector of longitudes in decimal degrees East.
latitude	Vector of latitudes in decimal degrees North.
dataset	Name of spatial dataset to use.
stateCodes	Vector of US state codes used to limit the search.
allData	Logical specifying whether a full dataframe should be returned.
useBuffering	Logical flag specifying the use of location buffering to find the nearest polygon if no target polygon is found.

Value

Vector of English language county names.

References

http://www.naturalearthdata.com/downloads/10m-cultural-vectors/

See Also

getSpatialData

Examples

## Not run: 
library(MazamaSpatialUtils)
setSpatialDataDir("~/Data/Spatial_0.8")

loadSpatialData("USCensusCounties")

longitude <- seq(-140, -90)
latitude <- seq(20, 70)
getUSCounty(longitude, latitude)

## End(Not run)

MazamaSpatialUtils documentation built on Nov. 3, 2024, 9:07 a.m.