ExportKMLRasterOverlay: ExportKMLRasterOverlay
In Blakemassey/gisr: Functions for Spatial Data Manipulation and Plotting

Export KML Raster function

1 2	ExportKMLRasterOverlay(raster, color_pal, alpha, maxpixels, blur, colNA, outfile, output_dir)

`raster`	a Raster* object
`color_pal`	color palette, can be a color ramp (e.g., c("white", "red") or a specific palette (e.g., "SAGA_pal[[1]]")
`alpha`	numeric (0-1), transparency level of the kml. Default is 1.
`method`	method used to compute values for the new RasterLayer. Either 'ngb' (nearest neighbor), which is useful for categorical variables, or 'bilinear' (bilinear interpolation; the default value), which is appropriate for continuous variables.
`overwrite`	logical, whether or not to overwrite result file. Default is TRUE.
`maxpixels`	maximum number of pixels. If ncell(raster) > maxpixels, sample is used to reduce the number of pixels.
`blur`	integer (default=10). Higher values help avoid blurring of isolated pixels (at the expense of a png file that is blur^2 times larger)
`colNA`	color to use for the background (default is transparent)
`outfile`	name of KML, default is to use name of raster
`output_dir`	output folder location, default is getwd()
`zip`	logical, whether or not to convert .kml to .kmz