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r3.in.ascii.1grass

NAME

r3.in.ascii

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.

EXAMPLE

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

r3.out.ascii, v.to.rast3

Last changed: $Date: 2006/10/04 07:54:03 $

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