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r.transect(1grass)


NAME

   r.transect   - Outputs raster map layer values lying along user defined
   transect line(s).

KEYWORDS

   raster, transect

SYNOPSIS

   r.transect
   r.transect --help
   r.transect                        [-g]                         map=name
   line=east,north,azimuth,distance[,east,north,azimuth,distance,...]
   [null_value=string]   [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
   -g
       Output easting and northing in first two  columns  of  four  column
       output

   --help
       Print usage summary

   --verbose
       Verbose module output

   --quiet
       Quiet module output

   --ui
       Force launching GUI dialog

   Parameters:
   map=name [required]
       Raster map to be queried

   line=east,north,azimuth,distance[,east,north,azimuth,distance,...]
   [required]
       Transect definition

   null_value=string
       String representing NULL value
       Default: *

DESCRIPTION

   This program outputs, in ASCII, the values in a raster  map  which  lie
   along  one  or  more  user-defined  transect  lines.  The transects are
   described by their starting coordinates, azimuth, and distance.

   The line parameter is a definition of (each) transect  line,  specified
   by   the   geographic  coordinates  of  its  starting  point  (easting,
   northing), the angle and direction of its  travel  (azimuth),  and  its
   distance (distance).

   The  azimuth  is  an  angle, in degrees, measured to the east of north.
   The distance is in map units (meters for a metered database, like UTM).

   The null parameter can optionally be set to change the character string
   representing null values.

NOTES

   This  program  is  a  front-end  to  the  r.profile program.  It simply
   converts the azimuth and distance to an ending coordinate and then runs
   r.profile.    There  once  were  width=  and  result=raw|median|average
   options which are not currently implemented.

SEE ALSO

   r.profile, wxGUI profile tool

AUTHOR

   Michael Shapiro, U.S. Army Construction Engineering Research Laboratory

   Last changed: $Date: 2012-11-25 02:59:42 -0800 (Sun, 25 Nov 2012) $

SOURCE CODE

   Available at: r.transect source code (history)

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

    2003-2016 GRASS Development Team, GRASS GIS 7.2.0 Reference Manual



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