R: Get the geometry (coordinates) of a SpatVector

geom {terra} | R Documentation

## Get the geometry (coordinates) of a SpatVector

### Description

Get the geometry of a SpatVector. If `wkt=FALSE`, this is a five-column matrix or data.frame: the vector object ID, the IDs for the parts of each object (e.g. five polygons that together are one spatial object), the x (longitude) and y (latitude) coordinates, and a flag indicating whether the part is a "hole" (only relevant for polygons).

If `wkt=TRUE`, the"well-known text" representation is returned as a character vector.

### Usage

    ## S4 method for signature 'SpatVector'
    geom(x, wkt=FALSE, hex=FALSE, df=FALSE)

### Arguments

`x` | SpatVector
`wkt` | logical. If `TRUE` the WKT geometry is returned (unless `hex` is also `TRUE`)
`hex` | logical. If `TRUE` the hexadecimal geometry is returned
`df` | logical. If `TRUE` a `data.frame` is returned in stead of a matrix (only for `wkt=FALSE` and `hex=FALSE`

### Value

matrix

### See Also

See `xyFromCell` to get the coordinates of the cells of a SpatRaster

### Examples

    x1 <- rbind(c(-175,-20), c(-140,55), c(10, 0), c(-140,-60))
    x2 <- rbind(c(-125,0), c(0,60), c(40,5), c(15,-45))
    x3 <- rbind(c(-10,0), c(140,60), c(160,0), c(140,-55))
    x4 <- rbind(c(80,0), c(105,13), c(120,2), c(105,-13))
    z <- rbind(cbind(object=1, part=1, x1), cbind(object=2, part=1, x2),
               cbind(object=3, part=1, x3), cbind(object=3, part=2,  x4))
    colnames(z)[3:4] <- c('x', 'y')
    z <- cbind(z, hole=0)
    z[(z[, "object"]==3 & z[,"part"]==2), "hole"] <- 1

    p <- vect(z, "polygons")
    geom(p)

    f <- system.file("ex/lux.shp", package="terra")
    v <- vect(f)
    g <- geom(v)
    head(g)

    w <- geom(v, wkt=TRUE)
    substr(w, 1, 60)

[Package terra version 1.2-5 Index]