GRASS logo

Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

NAME

v.ellipse - Computes the best-fitting ellipse for given vector data.

KEYWORDS

vector, geometry, best-fitting ellipse

SYNOPSIS

v.ellipse
v.ellipse --help
v.ellipse input=name output=name [step=float] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

--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
output=name [required]
Name for output vector map
step=float
Step size in degrees
Default: 4

Table of contents

DESCRIPTION

v.ellipse computes the best-fitting ellipse for input vector map and creates new output vector map with ellipse. Input vector data might be 2D points, lines, or areas.

Fig: Fitting ellipse created with v.ellipse
The parameters of ellipse are printed on output if --verbose flag is given.

EXAMPLE

Example of v.ellipse created around set of points (using data points_of_interest, North Carolina sample data set). Ellipse is is approximated by linestring with point distance 1 degree (step).
v.ellipse input=points_of_interest output=ellipse step=1

REFERENCES

SEE ALSO

v.hull

AUTHOR

Tereza Fiedlerova, OSGeoREL, Czech Technical University in Prague, Czech Republic

SOURCE CODE

Available at: v.ellipse source code (history)

Latest change: Mon Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55


Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

Main index | Vector index | Topics index | Keywords index | Graphical index | Full index

© 2003-2022 GRASS Development Team, GRASS GIS 7.8.8dev Reference Manual