Make a VRT header file

Create a VRT header file for a "flat binary" raster file that needs a header file to be able to read it, but does not have it.

Usage

makeVRT(filename, nrow, ncol, nlyr=1, extent, xmin, ymin, xres, yres=xres, xycenter=TRUE,
   crs="+proj=longlat", lyrnms="", datatype, NAflag=NA, bandorder="BIL", byteorder="LSB",
   toptobottom=TRUE, offset=0, scale=1)

Arguments

filename

character. raster filename (without the ".vrt" extension)

nrow

positive integer, the number of rows

ncol

positive integer, the number of columns

nlyr

positive integer, the number of layers

extent

SpatExtent or missing

xmin

numeric. minimum x coordinate (only used if extent is missing)

ymin

numeric. minimum y coordinate (only used if extent is missing)

xres

positive number. x resolution

yres

positive number. y resolution)

xycenter

logical. If TRUE, xmin and xmax represent the coordinates of the center of the extreme cell, in stead of the coordinates of the outside corner. Only used of extent is missing

crs

character. Coordinate reference system description

lyrnms

character. Layer names

datatype

character. One of "INT2S", "INT4S", "INT1U", "INT2U", "INT4U", "FLT4S", "FLT8S". If missing, this is guessed from the file size (INT1U for 1 byte per value, INT2S for 2 bytes and FLT4S for 4 bytes per value). This may be wrong because, for example, 2 bytes per value may in fact be INT2U (with the U for unsigned) values

NAflag

numeric. The value used as the "NA flag"

bandorder

character. One of "BIL", "BIP", or "BSQ". That is Band Interleaved by Line, or by Pixel, or Band SeQuential

byteorder

character. One of "LSB", "MSB". "MSB" is common for files generated on Linux systems, whereas "LSB" is common for files generated on windows

toptobottom

logical. If FALSE, the values are read bottom to top

offset

numeric. offset to be applied

scale

numeric. scale to be applied

Value

character (.VRT filename)

See also

vrt to create a vrt for a collection of raster tiles