r.in.ascii - Converts a GRASS ASCII raster file to binary raster map.

       Michael Shapiro, U.S. Army Construction Engineering Research Laboratory
       Surfer support by Roger Miller

r.in.ascii allows a user to create a (binary) GRASS raster map layer from an ASCII raster input file with
       (optional) TITLE.

       The GRASS ASCII input file has a header section which describes  the  location  and  size  of  the  data,
       followed by the data itself.

       The header has 6 lines:
       north:   xxxxxx.xx
       south:   xxxxxx.xx
       east:    xxxxxx.xx
       west:    xxxxxx.xx
       rows:    r
       cols:    c
       The  north, south, east, and west field values entered are the coordinates of the edges of the geographic
       region.  The rows and cols field values entered describe the dimensions of the matrix of data to  follow.
       The data which follows is r rows of c integers.

       Optionally the following parameters can be defined in the header section:
       null: nn
       type: float
       multiplier: 2.

       "null" defines a string or number to be converted to NULL value (no data).
       "type" defines the data type (int, float double) and is not required.
       "multiplier" is an optional parameter to multiply each cell value.

       The following is a sample input file to r.in.ascii:
       north:                   4299000.00
       south:                   4247000.00
       east:                     528000.00
       west:                     500000.00
       rows:                         10
       cols:                         15
       null:                      -9999
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
       1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

       raster, import, conversion, ASCII

r.in.ascii  - Converts a GRASS ASCII raster file to binary raster map.

       The  geographic  coordinates  north,  south,  east,  and  west describe the outer edges of the geographic
       region.  They run along the edges of the cells at the edge of the geographic region and not  through  the
       center  of  the  cells at the edges.  The NW value occurs at the beginning of the first line of data, and
       the SW value occurs at the beginning of the last line of data.

       The data (which follows the header section) must contain r x c values, but it is not necessary  that  all
       the data for a row be on one line. A row may be split over many lines.

       The imported cell type can be forced using the type option, default is auto-detection.

       The  header  information in ESRI Raster ASCII files differs from GRASS.  To convert an Arc/Info (ArcView)
       ASCII grid file into GRASS, see r.in.gdal.

       SURFER (Golden Software) ASCII files may be imported by passing the -s flag.

r.import,r.out.ascii,r.in.gdal,r.out.gdal,r.in.bin,r3.in.ascii

       Available at: r.in.ascii source code (history)

       Accessed: Friday Apr 04 01:19:11 2025

       Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

       © 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual

GRASS 8.4.1                                                                                   r.in.ascii(1grass)

r.in.asciir.in.ascii--helpr.in.ascii    [-s]    input=nameoutput=name    [type=string]     [title=phrase]     [multiplier=float]
       [null_value=string]   [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:-s
           SURFER (Golden Software) ASCII file will be imported

       --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 file to be imported
           ’-’ for standard input

       output=name[required]
           Name for output raster map

       type=string
           Type of raster map to be created
           Default: CELL for integer values, DCELL for floating-point values
           Options: CELL,FCELL,DCELLCELL: Integer
           FCELL: Single precision floating point
           DCELL: Double precision floating point

       title=phrase
           Title for resultant raster map

       multiplier=float
           Multiplier for ASCII data
           Default: read from header

       null_value=string
           String representing NULL value data cell
           Default: read from header