![]() The default is TRUE, in which case a raster attribute table is created for files that have one 'raster' and netcdf format files are always read with native drivers. If TRUE, reading and writing of IDRISI, BIL, BSQ, BIP, SAGA, and Arc ASCII files is done with native (raster package) drivers, rather then via GDAL. Subdataset number for a file with subdatasets ![]() If x is a filename, the following additional variables are recognized: If not NULL, arguments xmn, xmx, ymn, ymx and crs (unless template is an Extent object) are ignored Raster* or Extent object used to set the extent (and CRS in case of a Raster* object). ![]() If this argument is used, arguments ncols and nrows are ignored Numeric vector of length 1 or 2 to set the resolution (see res). Also see under Details if x is a character (filename) 90, "+proj=longlat +datum=WGS84" is used. 360 and the y coordinates are within -90. If this argument is missing, and the x coordinates are within -360. PROJ.4 type description of a Coordinate Reference System (map projection). If present, the arguments xmn, xmx, ymn and ynx are ignoredĬharacter or object of class CRS. If TRUE, the cell values of ' x' are copied to the RasterLayer object that is returned An empty RasterLayer (no associated values) is returned if layer=0 The layer (variable) to use in a multi-layer file, or the layer to extract from a RasterStack/Brick or SpatialPixelsDataFrame or SpatialGridDataFrame. Supported file types are the 'native' raster package format and those that can be read by GDAL Raster(x, xmn=0, xmx=1, ymn=0, ymx=1, crs="", template=NULL)įilename (character), Extent, Raster*, sf, SpatialPixels*, SpatialGrid*, object, 'image', matrix, im, or missing. You can assign new values with setValues and with replacement.įor an overview of the functions in the raster package have a look here: raster-package. You can access cell-values with getValues, extract and related functions. when a RasterLayer is created from a file, it does (initially) not contain any cell (pixel) values in (RAM) memory, it only has the parameters that describe the RasterLayer. RasterLayer objects can be created from scratch, a file, an Extent object, a matrix, an 'image' object, or from a Raster*, Spatial*, im (spatstat) asc, kasc (adehabitat*), grf (geoR) or kde object. Raster: Create a RasterLayer object Description
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