SpatialLinesMidPoints: Line midpoints
In maptools: Tools for Handling Spatial Objects
SpatialLinesMidPoints R Documentation
Line midpoints
Description
The function onverts SpatialLinesDataFrame to SpatialPointsDataFrame with points at the midpoints of the line segments.
Usage
SpatialLinesMidPoints(sldf)
Arguments
sldf
A SpatialLines or SpatialLinesDataFrame object
Details
The function builds a SpatialPointsDataFrame from the midpoints of Line objects belonging to Lines objects in an object inheriting from a Spatial Lines object. The output data slot contains an index variable showing which Lines object the midpoints belong to.
Value
A SpatialPointsDataFrame object created from the input object.
Author(s)
Jonathan Callahan, modified by Roger Bivand
Examples
xx <- readShapeLines(system.file("shapes/fylk-val.shp", package="maptools")[1],
proj4string=CRS("+proj=utm +zone=33 +datum=WGS84"))
plot(xx, col="blue")
spdf <- SpatialLinesMidPoints(xx)
plot(spdf, col="orange", add=TRUE)
maptools documentation built on Oct. 3, 2023, 3:01 p.m.
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| SpatialLinesMidPoints | R Documentation |
Line midpoints
Description
The function onverts SpatialLinesDataFrame to SpatialPointsDataFrame with points at the midpoints of the line segments.
Usage
SpatialLinesMidPoints(sldf)
Arguments
sldf |
A SpatialLines or SpatialLinesDataFrame object |
Details
The function builds a SpatialPointsDataFrame from the midpoints of Line objects belonging to Lines objects in an object inheriting from a Spatial Lines object. The output data slot contains an index variable showing which Lines object the midpoints belong to.
Value
A SpatialPointsDataFrame object created from the input object.
Author(s)
Jonathan Callahan, modified by Roger Bivand
Examples
xx <- readShapeLines(system.file("shapes/fylk-val.shp", package="maptools")[1],
proj4string=CRS("+proj=utm +zone=33 +datum=WGS84"))
plot(xx, col="blue")
spdf <- SpatialLinesMidPoints(xx)
plot(spdf, col="orange", add=TRUE)
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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