= {
" ",
"Usage: bsurf [options] input.tif output.map",
"--------------------------------------------",
"Calculates a 3D surface from an AFM image.",
" ",
"Actions:",
"-expand 10               Surface expansion: value = new z dimension.",
"-threshold 1.6,1         Calculate a 2D height image using this threshold",
"                         and direction: 0=bottom up, 1=top down.",
"-invert                  Invert inside & outside (default not).",
" ",
"Parameters:",
"-verbose 7               Verbosity of output.",
"-datatype u              Force writing of a new data type.",
"-positions 2.5,6.3       Z positions of surface minimum and maximum (angstrom).",
"-origin 0.8,-10,15.7     Set the origin (default from input image).",
"-sampling 1.5,1.5,1.5    Dimension scaling (default 1,1,1 A/pixel).",
"-resolution 0.5,2.3      Upper & lower sigma bounds (default 3.236,3.236).",
"-Density 0.74            Density within the surface (default 0.81 Da/A3).",
" ",
"Input:",
"-Stdev sd.map            Standard deviation map (default no map).",
" ",
NULL
}