Provided by: grass-doc_7.8.2-1build3_all bug

NAME

       v.out.ascii  - Exports a vector map to a GRASS ASCII vector representation.
       By default only features with category are exported. To export all features use ’layer=-1’.

KEYWORDS

       vector, export, output, ASCII

SYNOPSIS

       v.out.ascii
       v.out.ascii --help
       v.out.ascii    [-ocr]    input=name     [layer=string]      [type=string[,string,...]]      [output=name]
       [columns=name[,name,...]]    [cats=range]     [where=sql_query]    format=string    [separator=character]
       [precision=integer]   [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
       -o
           Create old (version 4) ASCII file

       -c
           Include column names in output (points mode)

       -r
           Only export points falling within current 3D region (points mode)

       --overwrite
           Allow output files to overwrite existing files

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       input=name [required]
           Name of input vector map
           Or data source for direct OGR access

       layer=string
           Layer number or name (’-1’ for all layers)
           A  single vector map can be connected to multiple database tables. This number determines which table
           to use. When used with direct OGR access this is the layer name.
           Default: 1

       type=string[,string,...]
           Input feature type
           Options: point, line, boundary, centroid, area, face, kernel
           Default: point,line,boundary,centroid,area,face,kernel

       output=name
           Name for output ASCII file or ASCII vector name if ’-o’ is defined
           If not given or ’-’ then standard output

       columns=name[,name,...]
           Name of attribute column(s) to be exported (point mode)
           "*" for all columns

       cats=range
           Category values
           Example: 1,3,7-9,13

       where=sql_query
           WHERE conditions of SQL statement without ’where’ keyword
           Example: income < 1000 and population >= 10000

       format=string [required]
           Output format
           Options: point, standard, wkt
           Default: point
           point: Simple point format (point per row)
           standard: GRASS ASCII vector format
           wkt: OGC well-known text

       separator=character
           Field separator
           Field separator (points mode)
           Default: pipe

       precision=integer
           Number of significant digits (floating point only)
           Options: 0-32
           Default: 8

DESCRIPTION

       v.out.ascii converts a GRASS vector map in binary format to a GRASS vector map  in  ASCII  format.  Using
       flag -o v.out.ascii output will be in old (version 4) ASCII format.

       If the output parameter is not given then the data is sent to standard output.

NOTES

       The  v.in.ascii  module  performs the function of v.out.ascii in reverse; i.e. it converts vector maps in
       ASCII format to their binary format. These two companion  modules  are  useful  both  for  importing  and
       exporting vector maps between GRASS and other software, and for transferring data between machines.

       If   old   version   is   requested,   the   output   files   from   v.out.ascii   is   placed   in   the
       $LOCATION/$MAPSET/dig_ascii/ and $LOCATION/$MAPSET/dig_att directory.

       If layer > 0 then only features with a category number will be exported. Use v.category to  add  them  if
       needed or define layer=-1 to export also features without category.

       v.out.ascii  in  the  old  version  mode  (-o) does not copy the dig_cats file associated with the binary
       vector input map to the new output file name. The user must copy the dig_cats file to the new output name
       if this is desired (e.g. using the UNIX cp command).

       It  is  possible to output the coordinates of vertices in a non-points vector feature by first converting
       the vector feature to a points map with v.to.points and then exporting with v.out.ascii in points mode.

EXAMPLES

   Standard mode
       See ASCII format specification.

       v.out.ascii input=quads format=standard
       ORGANIZATION: US Army Const. Eng. Rsch. Lab
       DIGIT DATE:   May 1987
       DIGIT NAME:   grass
       MAP NAME:     Quads
       MAP DATE:     May 1987
       MAP SCALE:    24000
       OTHER INFO:
       ZONE:         13
       MAP THRESH:   18.288000
       VERTI:
       B  4
        599587.1820962 4914067.53414294
        589639.15126831 4913922.5687301
        589440.96838162 4927803.62500018
        599375.87959179 4927959.83330436
       B  2
        599375.87959179 4927959.83330436
        599587.1820962 4914067.53414294
       B  4
        599587.1820962 4914067.53414294
        609541.5508239 4914236.0597482
        609316.10665227 4928116.8490555
        599375.87959179 4927959.83330436
       C  1 1
        594125.63    4921115.58
        1     1
       C  1 1
        604433.84    4921087.1
        1     2

   Point mode
       v.out.ascii input=quads format=point
       594125.63|4921115.58|1
       604433.84|4921087.1|2
       Print also selected attributes:
       v.out.ascii input=geodetic_pts format=point where="cat > 5 and cat <= 8" columns=GEOD_NAME
       573638.06289275|271623.25042595|6|27 WC 6
       574416.81289275|274116.65542595|7|27 WC 7
       575301.31189275|275303.81342595|8|27 WC 8
       To print all attributes type columns=*:
       v.out.ascii input=geodetic_pts format=point where="cat > 5 and cat <= 8" columns=*
       573638.06289275|271623.25042595|6|6|0.00000000|0.00000000|6|6|27 WC 6|573638.09200000|271623.24100000|0.00|0|1.00000000|1.00000000
       574416.81289275|274116.65542595|7|7|0.00000000|0.00000000|7|7|27 WC 7|574416.84100000|274116.64900000|0.00|0|1.00000000|1.00000000
       575301.31189275|275303.81342595|8|8|0.00000000|0.00000000|8|8|27 WC 8|575301.30600000|275303.82600000|0.00|0|1.00000000|1.00000000

   WKT mode
       WKT is abbreviation for Well-known text.
       v.out.ascii input=quads format=wkt
       POLYGON((599587.18209620 4914067.53414294, 589639.15126831 4913922.56873010,
                589440.96838162 4927803.62500018, 599375.87959179 4927959.83330436,
                599587.18209620 4914067.53414294))
       POLYGON((599587.18209620 4914067.53414294, 599375.87959179 4927959.83330436,
                609316.10665227 4928116.84905550, 609541.55082390 4914236.05974820,
                599587.18209620 4914067.53414294))

SEE ALSO

        v.category, v.in.ascii, v.to.points

       GRASS ASCII vector format specification
       GRASS SQL interface

AUTHORS

       Michael Higgins, U.S. Army Construction Engineering Research Laboratory
       James Westervelt, U.S. Army Construction Engineering Research Laboratory
       Radim Blazek, ITC-Irst, Trento, Italy
       Attribute selection added by Martin Landa, Czech Technical University in Prague, Czech Republic (2008/12)

SOURCE CODE

       Available at: v.out.ascii source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual