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=string] [--verbose] [-- quiet]

Flags:¶

-g

 

Output easting and northing in first two columns of four column output

--verbose

 

Verbose module output

--quiet

 

Quiet module output

Parameters:¶

map=name

 

Raster map to be queried

line=east,north,azimuth,distance[,east,north,azimuth,distance,...]

 

Transect definition

null=string

 

Char string to represent no data cell

 

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, gis.m: PROFILE TOOL

AUTHOR¶

Michael Shapiro, U.S. Army Construction Engineering Research Laboratory Last changed: $Date: 2008-05-16 21:09:06 +0200 (Fri, 16 May 2008) $ Full index © 2003-2014 GRASS Development Team