makeVRT function

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.

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

Returns

character (.VRT filename)

See Also

vrt to create a vrt for a collection of raster tiles