as_esri_geometry {arcgisutils}

Create Esri JSON Geometry Objects

Description

as_esri_geometry() converts an sfg object to a EsriJSON Geometry object as a string.

Usage

as_esri_geometry(x, crs = NULL, call = rlang::caller_env())

Arguments

x

an object of class sfg. Must be one of "POINT", "MULTIPOINT", "LINESTRING", "MULTILINESTRING", "POLYGON", or "MULTIPOLYGON".

crs

the coordinate reference system. It must be interpretable by sf::st_crs().

call

The execution environment of a currently running function, e.g. call = caller_env(). The corresponding function call is retrieved and mentioned in error messages as the source of the error.

You only need to supply call when throwing a condition from a helper function which wouldn't be relevant to mention in the message.

Can also be NULL or a defused function call to respectively not display any call or hard-code a code to display.

For more information about error calls, see Including function calls in error messages.

Details

See as_featureset() and as_features() for converting sfc and sf objects into EsriJSON.

Value

a scalar string

References

API Reference

Examples

library(sf)
# POINT
# create sfg points
xy <- st_point(c(1, 2))
xyz <- st_point(c(1, 2, 3))
xym <- st_point(c(1, 2, 3), dim = "XYM")
xyzm <- st_point(c(1, 2, 3, 4))

as_esri_geometry(xy)
as_esri_geometry(xyz)
as_esri_geometry(xym)
as_esri_geometry(xyzm)

# MULTIPOINT
# vector to create matrix points
set.seed(0)
x <- rnorm(12)

xy <- st_multipoint(matrix(x, ncol = 2))
xyz <- st_multipoint(matrix(x, ncol = 3))
xym <- st_multipoint(matrix(x, ncol = 3), dim = "XYM")
xyzm <- st_multipoint(matrix(x, ncol = 4), dim = "XYM")

as_esri_geometry(xy)
as_esri_geometry(xyz)
as_esri_geometry(xym)
as_esri_geometry(xyzm)

# LINESTRING
xy <- st_linestring(matrix(x, ncol = 2))
xyz <- st_linestring(matrix(x, ncol = 3))
xym <- st_linestring(matrix(x, ncol = 3), dim = "XYM")
xyzm <- st_linestring(matrix(x, ncol = 4), dim = "XYM")

as_esri_geometry(xy)
as_esri_geometry(xyz)
as_esri_geometry(xym)
as_esri_geometry(xyzm)

# MULTILINESTRING
as_esri_geometry(st_multilinestring(list(xy, xy)))
as_esri_geometry(st_multilinestring(list(xyz, xyz)))
as_esri_geometry(st_multilinestring(list(xym, xym)))
as_esri_geometry(st_multilinestring(list(xyzm, xyzm)))

# POLYGON
coords <- rbind(
  c(0, 0, 0, 1),
  c(0, 1, 0, 1),
  c(1, 1, 1, 1),
  c(1, 0, 1, 1),
  c(0, 0, 0, 1)
)

xy <- st_polygon(list(coords[, 1:2]))
xyz <- st_polygon(list(coords[, 1:3]))
xym <- st_polygon(list(coords[, 1:3]), dim = "XYM")
xyzm <- st_polygon(list(coords))

as_esri_geometry(xy)
as_esri_geometry(xyz)
as_esri_geometry(xym)
as_esri_geometry(xyzm)

# MULTIPOLYGON
as_esri_geometry(st_multipolygon(list(xy, xy)))
as_esri_geometry(st_multipolygon(list(xyz, xyz)))
as_esri_geometry(st_multipolygon(list(xym, xym)))
as_esri_geometry(st_multipolygon(list(xyzm, xyzm)))