Description Usage Arguments Value Author(s) See Also Examples

The shortest distance between points and polylines or polygons.

1 |

`p` |
longitude/latitude of point(s). Can be a vector of two numbers, a matrix of 2 columns (first one is longitude, second is latitude) or a SpatialPoints* object |

`line` |
longitude/latitude of line as a matrix of 2 columns (first one is longitude, second is latitude) or a SpatialLines* or SpatialPolygons* object |

`distfun` |
A distance function, such as distGeo |

matrix with distance and lon/lat of the nearest point on the line. Distance is in the same unit as `r`

in the `distfun`

(default is meters). If `line`

is a `Spatial*`

object, the ID (index) of (one of) the nearest objects is also returned. Thus if the objects are polygons and the point is inside a polygon the function may return the ID of a neighboring polygon that shares the nearest border. You can use the `over`

functions in packages `sp`

or `rgeos`

for point-in-polygon queries.

George Wang and Robert Hijmans

1 2 3 4 5 6 7 8 9 | ```
line <- rbind(c(-180,-20), c(-150,-10), c(-140,55), c(10, 0), c(-140,-60))
pnts <- rbind(c(-170,0), c(-75,0), c(-70,-10), c(-80,20), c(-100,-50),
c(-100,-60), c(-100,-40), c(-100,-20), c(-100,-10), c(-100,0))
d = dist2Line(pnts, line)
plot( makeLine(line), type='l')
points(line)
points(pnts, col='blue', pch=20)
points(d[,2], d[,3], col='red', pch='x')
for (i in 1:nrow(d)) lines(gcIntermediate(pnts[i,], d[i,2:3], 10), lwd=2)
``` |

```
Loading required package: sp
```

geosphere documentation built on Nov. 17, 2017, 4:59 a.m.

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