linref-gProject: Project Points to Line Geometry

Description Usage Arguments Details Value Author(s) See Also Examples

Description

Return distances along geometry to points nearest the specified points.

Usage

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gProject(spgeom, sppoint, normalized = FALSE)

Arguments

spgeom

SpatialLines or SpatialLinesDataFrame object

sppoint

SpatialPoints or SpatialPointsDataFrame object

normalized

Logical determining if normalized distances should be used

Details

If normalized=TRUE, distances normalized to the length of the geometry are returned, i.e., values between 0 and 1.

Value

a numeric vector containing the distances along the line to points nearest to the specified points

Author(s)

Rainer Stuetz

See Also

gInterpolate

Examples

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l <- readWKT("LINESTRING(0 1, 3 4, 5 6)")
p1 <- readWKT("MULTIPOINT(3 2, 3 5)")
frac <- gProject(l, p1)
p2 <- gInterpolate(l, frac)
plot(l, axes=TRUE)
plot(p1, col = "blue", add = TRUE)
plot(p2, col = "red", add = TRUE)

Example output

rgeos version: 0.3-23, (SVN revision 546)
 GEOS runtime version: 3.4.2-CAPI-1.8.2 r3921 
 Linking to sp version: 1.2-3 
 Polygon checking: TRUE 

rgeos documentation built on Dec. 15, 2021, 1:07 a.m.

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