createComparableCDL: Create comparable raster images

In cdlTools: Tools to Download and Work with USDA Cropscape Data

Description

createComparableCDL uses a base index within a raster list, and sets all other raster images within the list to the same resolution, projection, and extent. The raster function resample is used to tranform raster images, therefore this function may be quite slow without tuning.

Usage

createComparableCDL(rasterList, filenames, baseIndex, progress = "")

Arguments

rasterList	A list of raster images.
filenames	An array of file names of raster images to coerce into a raster list, if rasterList is not provided.
baseIndex	The index of the raster list element that all other elements will match with respect to resolution, projection and extent.
progress	A string for the raster progress bar type, default "" is none, "text" provides text output, "window" provides a gui window if available.

Value

A list of raster images matching in extent, resolution, and projection.

Author(s)

Jonathan Lisic, [e-mail]

Examples

## Not run: 
# download multiple years of Iowa Data
r <- getCDL('iowa',c(2006,2010))
# resample based on the 2006
r2 <- createComparableCDL(r,baseIndex=1)

## End(Not run)

cdlTools documentation built on July 2, 2020, 1:51 a.m.