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r3.in.ascii

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r3.in.ascii: Convert a 3D ASCII raster text file into a (binary) 3D raster map layer

NAME
r3.in.ascii - Convert a 3D ASCII raster text file into a (binary) 3D raster map layer

KEYWORDS

raster3d, voxel, import

SYNOPSIS

r3.in.ascii r3.in.ascii help r3.in.ascii input=name output=name [nv=string] [type=string] [precision=string] [compression=string] [tiledimension=XxYxZ] [--overwrite] [--verbose] [--quiet] Flags: --overwrite Allow output files to overwrite existing files --verbose Verbose module output --quiet Quiet module output Parameters: input=name Ascii raster map to be imported output=name Name for output raster3d map nv=string String representing NULL value data cell (use 'none' if no such value) Default: none type=string Data type used in the output file Options: default,double,float Default: default precision=string Precision used in the output file (default, max, or 0 to 52) Default: default compression=string The compression method used in the output file Options: default,rle,none Default: default tiledimension=XxYxZ The dimensions of the tiles used in the output file Default: default

DESCRIPTION

Convert a 3D ASCII raster text file into a (binary) 3D raster map layer. Parameters: type Data type used in the output file Options: default, double, float precision Precision used in the output file Options: default, max, 0-52 compression Note that the none option only specifies that neither LZW nor RLE is used for compression. It does not turn off the compression all together. G3D does not support non-compressed files. Options: default, rle, none tiledimension The dimension of the tiles used in the output file. The format is: XxYxZ nv Specifies which value to convert to NULL-value. If the specified value is none, no conversion is performed. Default is none. input Path and name of ASCII file to be imported output Name of the G3D output map

NOTES

The format for the ASCII file: north: floating point south: floating point east: floating point west: floating point top: floating point bottom: floating point rows: integer cols: integer levels: integer This header is followed by the cell values in floating point format organized in rows with constant col and level coordinate. The rows are organized by constant level coordinate. Individual cell values are separated by space or CR. NOTE: Currently, after the file has been imported, the stored values are compared with the original data. This feature is used to find bugs in the library at an early stage and will be turned off as soon as confidence has built up.
EXAMPLES
4x3x2 sample. Note lower-left (SW) corner of the bottom level comes first! This array format, where EW is preserved but NS is flipped, is sometimes known as "ij" coordinates. This is opposite to r.in.ascii's format, which places the SW corner at the beginning of the last row of data. north: 3.0 south: 0.0 east: 4.0 west: 0.0 top: 2.0 bottom: 0.0 rows: 3 cols: 4 levels: 2 x1,y1,z1 x2,y1,z1 x3,y1,z1 x4,y1,z1 x1,y2,z1 x2,y2,z1 x3,y2,z1 x4,y2,z1 x1,y3,z1 x2,y3,z1 x3,y3,z1 x4,y3,z1 x1,y1,z2 x2,y1,z2 x3,y1,z2 x4,y1,z2 x1,y2,z2 x2,y2,z2 x3,y2,z2 x4,y2,z2 x1,y3,z2 x2,y3,z2 x3,y3,z2 x4,y3,z2 Sample ASCII voxel map with one layer and several rows and columns (Spearfish area): north: 4925010.000000 south: 4924890.000000 east: 596760.000000 west: 596610.000000 top: 1.000000 bottom: 0.000000 rows: 4 cols: 5 levels: 1 1204.74 1204.48 1204.19 1203.81 1203.39 1203.89 1203.67 1203.34 1202.98 1202.43 1203.05 1202.80 1202.51 1202.11 1201.48 1202.10 1201.92 1201.62 1201.27 1200.68
AUTHORS
Roman Waupotitsch, Michael Shapiro, Helena Mitasova, Bill Brown, Lubos Mitas, Jaro Hofierka

SEE ALSO

r.in.ascii, r3.out.ascii, v.to.rast3 Last changed: $Date: 2006-10-16 14:20:14 +0200 (Mon, 16 Oct 2006) $ Full index (C) 2003-2010 GRASS Development Team R3.IN.ASCII(1)
 
 
 

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