sfg_multipolygon: sfg multipolygon

View source: R/sfg.R

sfg_multipolygonR Documentation

sfg multipolygon

Description

constructs sfg MULTIPOLYGON object

Usage

sfg_multipolygon(
  obj,
  x = NULL,
  y = NULL,
  z = NULL,
  m = NULL,
  polygon_id = NULL,
  linestring_id = NULL,
  close = TRUE
)

Arguments

obj

matrix or data.frame

x

x geometry column

y

y geometry column

z

z geometry column

m

m geometry column

polygon_id

column of ids for polygons (within the multipolygon)

linestring_id

column of ids for lines (within polygons)

close

logical indicating whether polygons should be closed. If TRUE, all polygons will be checked and force closed if possible

Value

sfg object of MULTIPOLYGON geometry

Examples


df <- data.frame(
  polygon_id = c(rep(1, 5), rep(2, 10))
  , line_id = c(rep(1, 10), rep(2, 5))
  , x = c(0,0,1,1,0,2,2,5,5,2,3,3,4,4,3)
  , y = c(0,1,1,0,0,2,5,5,2,2,3,4,4,3,3)
  , z = c(1)
  , m = c(1)
)

m <- as.matrix( df )

sfg_multipolygon( df[, c("x","y") ] )

sfg_multipolygon(
  df, x = "x", y = "y", polygon_id = "polygon_id", linestring_id = "line_id"
  )
sfg_multipolygon(
  df, x = "x", y = "y", z = "z", polygon_id = "polygon_id", linestring_id = "line_id"
  )
sfg_multipolygon(
  df, x = "x", y = "y", z = "z", m = "m", polygon_id = "polygon_id", linestring_id = "line_id"
  )


sfg_multipolygon( m[, c("x","y") ] )

sfg_multipolygon(
  m, x = "x", y = "y", polygon_id = "polygon_id", linestring_id = "line_id"
  )
sfg_multipolygon(
  m, x = "x", y = "y", z = "z", polygon_id = "polygon_id", linestring_id = "line_id"
  )
sfg_multipolygon(
  m, x = "x", y = "y", z = "z", m = "m", polygon_id = "polygon_id", linestring_id = "line_id"
  )


sfheaders documentation built on May 29, 2024, 1:36 a.m.