SpatialLines {sp} | R Documentation

## create objects of class SpatialLines or SpatialLinesDataFrame

### Description

create objects of class `SpatialLines` or `SpatialLinesDataFrame` from lists of `Lines` objects and data.frames; extract list od Lines from a SpatialLines object

### Usage

    SpatialLines(LinesList, proj4string = CRS(as.character(NA)))
    SpatialLinesDataFrame(sl, data, match.ID = TRUE)
    as.SpatialLines.SLDF(SLDF)
    getSpatialLinesMidPoints(SL)
    LineLength(cc, longlat = FALSE, sum = TRUE)
    LinesLength(Ls, longlat = FALSE)
    SpatialLinesLengths(SL, longlat)

### Arguments

`LinesList` | list with objects of class Lines-class
`proj4string` | Object of class `"CRS"`; holding a valid proj4 string
`sl, SL` | object of class SpatialLines-class
`data` | object of class `data.frame`; the number of rows in `data` should equal the number of `Lines` elements in `sl`
`match.ID` | logical: (default TRUE): match SpatialLines member Lines ID slot values with data.frame row names, and re-order the data frame rows if necessary; if character: indicates the column in `data` with Lines IDs to match
`SLDF` | SpatialLinesDataFrame object
`Ls` | Object of class `Lines`
`cc` | Object of class `Line`, or two-column matrix with points
`longlat` | if FALSE, Euclidean distance, if TRUE Great Circle distance in kilometers
`sum` | logical; if `TRUE` return scalar length of sum of segments in Line, if `FALSE` return vector with segment lengths

### Value

`SpatialLines` returns object of class `SpatialLines`; `SpatialLinesDataFrame` returns object of class `SpatialLinesDataFrame` `getSpatialLinesMidPoints` returns an object of class `SpatialPoints`,each point containing the (weighted) mean of the lines elements; weighted in the sense that mean is called twice.

### See Also

SpatialLines-class

[Package sp version 1.2-3 Index]