ZonalPipe

ctryCode

the SpatialPolygonsDataFrame country polygon to process

ctryPoly

path.in.shp

path.in.r

The path where to save the output zonal raster

path.out.r

The path to save the output zonal shapefile (Ignored)

path.out.shp

zone.attribute

stats

Create a zonal file if it does not exist and calculate the zonal stats by calling the 
 myZonal function. Modified from 
 <a href="http://www.guru-gis.net/efficient-zonal-statistics-using-r-and-gdal/">http://www.guru-gis.net/efficient-zonal-statistics-using-r-and-gdal/</a>

The Rnightlights package extracts raster and zonal statistics
from satellite nightlight rasters downloaded from the United States
National Oceanic and Atmospheric Administration (<http://www.noaa.gov>)
free data repositories. Both the DMSP-OLS annual and SNPP-VIIRS monthly
nightlight raster data are supported. Satellite nightlight raster tiles are
downloaded and cropped to the country boundaries using shapefiles from the GADM
database of Global Administrative Areas (<http://gadm.org>). Zonal statistics
are then calculated at the lowest administrative boundary for the selected
country and cached locally for future retrieval. Finally, a simple data
explorer/browser is included that allows one to visualize the cached data e.g.
graphing, mapping and clustering regional data.

Christopher Njuguna

Rnightlights

Satellite Nightlight Data Extraction

Henrik Bengtsson

Black Guru

Jeff Chen

Star Ying

Chris Elvidge

ZonalPipe function

Create a zonal file if it does not exist and calculate the zonal stats by calling the 
 myZonal function. Modified from 
 <a href='http://www.guru-gis.net/efficient-zonal-statistics-using-r-and-gdal/'>http://www.guru-gis.net/efficient-zonal-statistics-using-r-and-gdal/</a>

ZonalPipe: Create a zonal file if it does not exist and calculate the zonal stats

Description

Usage

Arguments

Value