sf: st_as_text – R documentation

Pricing

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

Get Started for Free

Documentation

st_as_text

Return Well-known Text representation of simple feature geometry or coordinate reference system

Description

Return Well-known Text representation of simple feature geometry or coordinate reference system

Usage

## S3 method for class 'crs'
st_as_text(x, ..., projjson = FALSE, pretty = FALSE)

st_as_text(x, ...)

## S3 method for class 'sfg'
st_as_text(x, ...)

## S3 method for class 'sfc'
st_as_text(x, ..., EWKT = FALSE)

Arguments

`x`	object of class `sfg`, `sfc` or `crs`
`...`	modifiers; in particular `digits` can be passed to control the number of digits used
`projjson`	logical; if TRUE, return projjson form (requires GDAL 3.1 and PROJ 6.2), else return well-known-text form
`pretty`	logical; if TRUE, print human-readable well-known-text representation of a coordinate reference system
`EWKT`	logical; if TRUE, print SRID=xxx; before the WKT string if `epsg` is available

Details

The returned WKT representation of simple feature geometry conforms to the simple features access specification and extensions, known as EWKT, supported by PostGIS and other simple features implementations for addition of SRID to a WKT string.

Examples

st_as_text(st_point(1:2))
st_as_text(st_sfc(st_point(c(-90,40)), crs = 4326), EWKT = TRUE)

sf

Simple Features for R

v0.9-8

GPL-2 | MIT + file LICENSE

Authors

Edzer Pebesma [aut, cre] (<https://orcid.org/0000-0001-8049-7069>), Roger Bivand [ctb] (<https://orcid.org/0000-0003-2392-6140>), Etienne Racine [ctb], Michael Sumner [ctb], Ian Cook [ctb], Tim Keitt [ctb], Robin Lovelace [ctb], Hadley Wickham [ctb], Jeroen Ooms [ctb] (<https://orcid.org/0000-0002-4035-0289>), Kirill Müller [ctb], Thomas Lin Pedersen [ctb], Dan Baston [ctb]

Initial release