r3.in.ascii(1)

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.

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) $

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