sfg_multipolygon: sfg multipolygon

In sfheaders: Converts Between R Objects and Simple Feature Objects

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 July 9, 2023, 7:41 p.m.