getCtryPolyUrl: Get the GADM url from which to download country polygons

In chrisvwn/Rnightlights: Satellite Nightlight Data Extraction

Description

Get the url from which to download country polygons. Polygons are downloaded from http://gadm.org. This provides the url to the zipped ESRI Shapefile which when decompressed contains a directory with the different country admin level boundary files. A sample url returned for Afghanistan: http://biogeo.ucdavis.edu/data/gadm2.8/shp/AFG_adm_shp.zip

Usage

getCtryPolyUrl(
  ctryCode = NULL,
  gadmVersion = pkgOptions("gadmVersion"),
  gadmPolyType = pkgOptions("gadmPolyType"),
  custPolyPath = NULL
)

Arguments

ctryCode	character string The ctryCode of interest
gadmVersion	The GADM version to use
gadmPolyType	The format of polygons to download from GADM
custPolyPath	Alternative to GADM. A path to a custom shapefile zip

Value

Character string url of the zipped ESRI shapefile for the ctryCode

Examples

ctryCode <- "KEN"
Rnightlights:::getCtryPolyUrl(ctryCode)
 #returns url for the zipped country ESRI shapefile

chrisvwn/Rnightlights documentation built on Sept. 7, 2021, 1:44 a.m.