myZonal: Calculate zonal statistics. Used internally

In Rnightlights: Satellite Nightlight Data Extraction

Description

Calculate zonal statistics. Used internally by zonalpipe. Modified from http://www.guru-gis.net/efficient-zonal-statistics-using-r-and-gdal/

Usage

myZonal(rast, nlType, configName, zone, nlStats, digits = 0,
  retVal = NULL, na.rm = TRUE, ...)

Arguments

rast	the country raster
nlType	the nlType of interest
configName	character the type of raster being processed
zone	the zonal country polygon layer
nlStats	a character list of statistics to calculate
digits	round off to how many decimals
retVal	Whether to return the raster data as a vector, or data.frame with spatial context NULL returns a vector of all values, colrowval returns a data.frame with row, col and raster value while lonlatval returns a data.frame with lon,lat and val.
na.rm	how to handle NAs
...	Other params to pass to the nlStats functions e.g. na.rm

Value

numeric value result of the given nlStat function

Rnightlights documentation built on Aug. 29, 2019, 5:02 p.m.