getCtryShpLyrNames: Get the standard names of polygon layers in a country
In Rnightlights: Satellite Nightlight Data Extraction

Description Usage Arguments Value Examples

Get the standard name of a polygon layer for a country. Used to refer to a polygon layer by name i.e. for CTRYCODE & lyrNum="0": lyrName="CTRYCODE_adm0", lyrNum="1": lyrName="KEN_adm1". Note this is different from the official country administration level name.

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getCtryShpLyrNames(ctryCodes = NULL, lyrNums, dnldPoly,
  gadmVersion = pkgOptions("gadmVersion"),
  gadmPolyType = pkgOptions("gadmPolyType"), custPolyPath = NULL)

`ctryCodes`	the ISO3 codes for the countries
`lyrNums`	the layer numbers starting from 0 = country level, 1 = first admin level
`dnldPoly`	`logical` If the country polygon doesn't exist should we download it?
`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

Character layer name

## Not run: 
#requires KEN polygon shapefile to exist in the polygons folder
getCtryShpLyrNames("KEN","1")
  #returns "KEN_adm1"

## End(Not run)

#export only due to exploreData() shiny app