utils: Utility functions

In arcgislayers: An Interface to ArcGIS Data Services

Utility functions

Description

Utility functions

Usage

clear_query(x)

list_fields(x)

list_items(x)

refresh_layer(x)

Arguments

x	an object of class FeatureLayer, Table, or ImageServer.

Details

• list_fields() returns a data.frame of the fields in a FeatureLayer or Table

• list_items() returns a data.frame containing the layers or tables in a FeatureServer or MapServer

• clear_query() removes any saved query in a FeatureLayer or Table object

• refresh_layer() syncs a FeatureLayer or Table with the remote resource picking up any changes that may have been made upstream. Returns an object of class x.

Value

See Details.

Examples

## Not run: 
  furl <- paste0(
    "https://services3.arcgis.com/ZvidGQkLaDJxRSJ2/arcgis/rest/services/",
    "PLACES_LocalData_for_BetterHealth/FeatureServer/0"
  )

  flayer <- arc_open(furl)

  # list fields available in a layer
  list_fields(flayer)

  # remove any queries stored in the query attribute
  clear_query(update_params(flayer, outFields = "*"))

  # refresh metadata of an object
  refresh_layer(flayer)

  map_url <- paste0(
    "https://services.arcgisonline.com/ArcGIS/rest/services/",
    "World_Imagery/MapServer"
  )

  # list all items in a server object
  list_items(arc_open(map_url))


## End(Not run)

arcgislayers documentation built on May 29, 2024, 10:42 a.m.