Generate a data source name (DSN) for the GDAL MEM driver

Source: R/mem.R

An array in memory can be referenced by a GDAL data source.

mem(
  x,
  extent = NULL,
  projection = "",
  PIXELOFFSET = 0L,
  LINEOFFSET = 0L,
  BANDOFFSET = 1L
)

Arguments

x

an R array, must be of numeric type (integer is converted to double)

extent

optional extent of the data in x,y c(xmin, xmax, ymin, ymax)

projection

projection string (optional, sets the SPATIALREFERENCE of the MEM driver since GDAL 3.7)

Value

character string, a DSN for use by GDAL

Details

This DSN will only work in R, and is only for use with GDAL read and query tools (so terra, sf, gdalcubes, vapour, etc.).

Examples

m <- matrix(as.integer(c(0L, 0, 0, 1)), 5L, 4L)
mem(m)
#> [1] "MEM:::DATAPOINTER=\"94183418072768\",PIXELS=5,LINES=4,BANDS=1,DATATYPE=Float64,GEOTRANSFORM=0/1/0/4/0/-1,PIXELOFFSET=0,LINEOFFSET=0,BANDOFFSET=160"
mem(volcano)
#> [1] "MEM:::DATAPOINTER=\"94183506760832\",PIXELS=87,LINES=61,BANDS=1,DATATYPE=Float64,GEOTRANSFORM=0/1/0/61/0/-1,PIXELOFFSET=0,LINEOFFSET=0,BANDOFFSET=42456"