convertNaturalEarthAdm1: Convert Level 1 (state) borders shapefile
In MazamaSpatialUtils: Spatial Data Download and Utility Functions

View source: R/convertNaturalEarthAdm1.R View source: R/convertNaturalEarthAdm0.R

convertNaturalEarthAdm1

R Documentation

Convert Level 1 (state) borders shapefile

Description

Returns a simple features data frame for top level administrative divisions.

The full resolution file will be named "NaturalEarthAdm0.rda". In addition, "_05", _02" and "_01" versions of the file will be created that that are simplified to 5%, 2% and 1%. Simplified versions will greatly improve the speed of both searching and plotting.

Returns a simple features data frame for 1st level administrative divisions

The full resolution file will be named "NaturalEarthAdm1.rda". In addition, "_05", _02" and "_01" versions of the file will be created that that are simplified to 5%, 2% and 1%. Simplified versions will greatly improve the speed of both searching and plotting.

Usage

convertNaturalEarthAdm1()

convertNaturalEarthAdm1()

Details

A country border shapefile is downloaded and converted to a simple features data frame with additional columns of data. The resulting file will be created in the spatial data directory which is set with setSpatialDataDir(). The resulting file will be created in this same spatial data directory.

A state border shapefile is downloaded and converted to a simple features data frame with additional columns of data. The resulting file will be created in the spatial data directory which is set with setSpatialDataDir(). The resulting file will be created in this same spatial data directory.

Within the MazamaSpatialUtils package the phrase 'state' refers to administrative divisions beneath the level of the country or nation. This makes sense in the United 'States'. In other countries this level is known as 'province', 'territory' or some other term.