gdal_retile.py -V (return code: 1)
GDAL 2.2.1, released 2017/06/23
gdal_retile.py --help (return code: 1)
Unrecognized command option: --help
Usage: gdal_retile.py
[-v] [-q] [-co NAME=VALUE]* [-of out_format]
[-ps pixelWidth pixelHeight]
[-overlap val_in_pixel]
[-ot {Byte/Int16/UInt16/UInt32/Int32/Float32/Float64/
CInt16/CInt32/CFloat32/CFloat64}]
[ -tileIndex tileIndexName [-tileIndexField fieldName]]
[ -csv fileName [-csvDelim delimiter]]
[-s_srs srs_def] [-pyramidOnly] -levels numberoflevels
[-r {near/bilinear/cubic/cubicspline/lanczos}]
[-useDirForEachRow]
-targetDir TileDirectory input_files