svc: Create a SpatVectorCollection

In terra: Spatial Data Analysis

Create a SpatVectorCollection

Description

Methods to create a SpatVectorCollection. This is an object to hold "sub-datasets", each a SpatVector, perhaps of different geometry type.

Usage

## S4 method for signature 'missing'
svc(x) 

## S4 method for signature 'SpatVector'
svc(x, ...) 

## S4 method for signature 'list'
svc(x) 

## S4 method for signature 'character'
svc(x, layer="", query="", extent=NULL, filter=NULL)

Arguments

x	SpatVector, character (filename), list with SpatVectors, or missing
...	Additional SpatVectors
layer	character. layer name to select a layer from a file (database) with multiple layers
query	character. An query to subset the dataset in the OGR-SQL dialect
extent	Spat* object. The extent of the object is used as a spatial filter to select the geometries to read. Ignored if filter is not NULL
filter	SpatVector. Used as a spatial filter to select geometries to read (the convex hull is used for lines or points). It is guaranteed that all features that overlap with the extent of filter will be returned. It can happen that additional geometries are returned

Value

SpatVectorCollection

Examples

f <- system.file("ex/lux.shp", package="terra")
v <- vect(f)
x <- svc()
x <- svc(v, v[1:3,], as.lines(v[3:5,]), as.points(v))
length(x)
x

# extract
x[3]

# replace
x[2] <- as.lines(v[1,])

terra documentation built on Oct. 13, 2023, 5:08 p.m.