Write header files to use together with raster binary files to read the data in other applications.
hdr(x, format, extension='.wld', filename='')
RasterLayer or RasterBrick object associated with a binary values file on disk
Type of header file: 'VRT', 'BIL', 'ENVI', 'ErdasRaw', 'IDRISI', 'SAGA', 'RASTER', 'WORLDFILE', 'PRJ'
File extension, only used with an ESRI worldfile (format='WORLDFILE')
character. Need to be provided if x is not associated with a file
The RasterLayer object must be associated with a file on disk.
You can use writeRaster to save a existing file in another format. But if you have a file in a 'raster' format (or similar), you can also only export a header file,
and use the data file (.gri) that already exists. The function can write a VRT (GDAL virtual raster) header (.vrt); an ENVI or BIL header (.hdr) file; an Erdas Raw (.raw) header file; an IDRISI (.rdc) or SAGA (.sgrd).
This (hopefully) allows for reading the binary data (.gri), perhaps after changing the file extension, in other programs such as ENVI or ArcGIS.