topology

makeNodes

mergeLines

removeDupNodes

emptyGeoms

snap

makeNodes,SpatVector-method

mergeLines,SpatVector-method

snap,SpatVector-method

removeDupNodes,SpatVector-method

emptyGeoms,SpatVector-method

<code>makeNodes</code> create nodes on lines
<code>mergeLines</code> connect lines to form polygons
<code>removeDupNodes</code> removes duplicate nodes in geometries and optionally rounds the coordinates
<code>emptyGeoms</code> returns the indices of empty (null) geometries. <code><a href="/link/is.na?package=terra&version=1.7-55" data-mini-rdoc="terra::is.na">is.na</a></code> also checks if any of the coordinates is <code>NA</code>.
<code>snap</code> makes boundaries of geometries identical if they are very close to each other.

methods

spatial

Methods for spatial data analysis with vector (points, lines, polygons) and raster (grid) data. Methods for vector data include geometric operations such as intersect and buffer. Raster methods include local, focal, global, zonal and geometric operations. The predict and interpolate methods facilitate the use of regression type (interpolation, machine learning) models for spatial prediction, including with satellite remote sensing data. Processing of very large files is supported. See the manual and tutorials on <https://rspatial.org/> to get started. 'terra' replaces the 'raster' package ('terra' can do more, and it is faster and easier to use).

Robert Hijmans

terra

Spatial Data Analysis

Robert J. Hijmans

Roger Bivand

Edzer Pebesma

Michael D. Sumner

topology function

<dl> <dt>x</dt>
<dd>SpatVector of lines or polygons</dd> <dt>y</dt>
<dd>SpatVector of lines or polygons to snap to. If <code>NULL</code> snapping is to the other geometries in <code>x</code></dd> <dt>tolerance</dt>
<dd>numeric. Snapping tolerance (distance between geometries)</dd> <dt>digits</dt>
<dd>numeric. Number of digits used in rounding. Ignored if &lt; 0</dd></dl>

Arguments

<code>makeNodes</code> create nodes on lines
<code>mergeLines</code> connect lines to form polygons
<code>removeDupNodes</code> removes duplicate nodes in geometries and optionally rounds the coordinates
<code>emptyGeoms</code> returns the indices of empty (null) geometries. <code><a href='https://rdrr.io/r/base/NA.html'>is.na</a></code> also checks if any of the coordinates is <code>NA</code>.
<code>snap</code> makes boundaries of geometries identical if they are very close to each other.

Vector topology methods — topology

<dl>

 <dt>x</dt>
<dd>SpatVector of lines or polygons</dd>

 <dt>y</dt>
<dd>SpatVector of lines or polygons to snap to. If <code>NULL</code> snapping is to the other geometries in <code>x</code></dd>

 <dt>tolerance</dt>
<dd>numeric. Snapping tolerance (distance between geometries)</dd>

 <dt>digits</dt>
<dd>numeric. Number of digits used in rounding. Ignored if &lt; 0</dd>

</dl>

Vector topology methods

topology: Vector topology methods

Description

Usage

Value

Arguments

See Also

Examples