arc_spatial_references: ESRI (ArcGIS) Spatial Reference data base

In arcgeocoder: Geocoding with the 'ArcGIS' REST API Service

ESRI (ArcGIS) Spatial Reference data base

Description

Database of available spatial references (CRS) in tibble format.

Format

A tibble with 9,608 rows and fields:

projtype

Projection type (⁠"ProjectedCoordinateSystems", "GeographicCoordinateSystems","VerticalCoordinateSystems"⁠)

wkid

Well-Known ID

latestWkid

Most recent wkid, in case that wkid is deprecated

authority

wkid authority (Esri or EPSG)

deprecated

Logical indicating if wkid is deprecated

description

Human-readable description of the wkid

areaname

Use area of the wkid

wkt

Representation of wkid in Well-Known Text (WKT). Useful when working with sf or terra

Details

This data base is useful when using the outsr argument of the functions.

Some projections ids have changed over time, for example Web Mercator is wkid = 102100 is deprecated and currently is wkid = 3857. However, both values would work, and they would return similar results.

Note

Data extracted on 15 January 2026.

Source

ESRI Projection Engine factory

See Also

sf::st_crs()

Other datasets: arc_categories

Examples

# Get all possible values
data("arc_spatial_references")
arc_spatial_references

# Request with deprecated Web Mercator
library(dplyr)
wkid <- arc_spatial_references |>
  filter(latestWkid == 3857 & deprecated == TRUE) |>
  slice(1)

glimpse(wkid)

add <- arc_geo("London, United Kingdom", outsr = wkid$wkid)

# Note values lat, lon and wkid. latestwkid give the current valid wkid
add |>
  select(lat, lon, wkid, latestWkid) |>
  glimpse()

# See with sf

try(sf::st_crs(wkid$wkid))

# But
try(sf::st_crs(wkid$latestWkid))

# or
try(sf::st_crs(wkid$wkt))

arcgeocoder documentation built on March 20, 2026, 5:10 p.m.