osmdata_sc: Return an OSM Overpass query as an osmdata object in...

In osmdatar/osmdata: Import 'OpenStreetMap' Data as Simple Features or Spatial Objects

Return an OSM Overpass query as an osmdata object in silicate (SC) format.

Description

Return an OSM Overpass query as an osmdata object in silicate (SC) format.

Usage

osmdata_sc(q, doc, quiet = TRUE)

Arguments

q	An object of class overpass_query constructed with opq and add_osm_feature or a string with a valid query, such as "(node(39.4712701,-0.3841326,39.4713799,-0.3839475);); out;". 39.4712701,-0.3841326,39.4713799,-0.3839475 May be be omitted, in which case the osmdata object will not include the query. See examples below.
doc	If missing, doc is obtained by issuing the overpass query, q, otherwise either the name of a file from which to read data, or an object of class xml2 returned from osmdata_xml.
quiet	suppress status messages.

Value

An object of class osmdata_sc representing the original OSM hierarchy of nodes, ways, and relations.

Note

The silicate format is currently highly experimental, and recommended for use only if you really know what you're doing.

See Also

Other extract: osmdata_data_frame(), osmdata_sf(), osmdata_sp(), osmdata_xml()

Examples

## Not run: 
query <- opq ("hampi india") |>
    add_osm_feature (key = "historic", value = "ruins")
# Then extract data from 'Overpass' API
hampi_sf <- osmdata_sc (query)

## End(Not run)

# Complex query as a string (not possible with regular osmdata functions)
q <- '[out:xml][timeout:50];
    area[name="Països Catalans"][boundary=political]->.boundaryarea;

    rel(area.boundaryarea)[admin_level=8][boundary=administrative];
    map_to_area -> .all_level_8_areas;

    ( nwr(area.boundaryarea)[amenity=townhall]; >; );
    is_in;
    area._[admin_level=8][boundary=administrative] -> .level_8_areas_with_townhall;

    (.all_level_8_areas; - .level_8_areas_with_townhall;);
    rel(pivot);
    (._; >;);
    out;'

## Not run: 
no_townhall <- osmdata_sc (q)
no_townhall

## End(Not run)

osmdatar/osmdata documentation built on July 4, 2025, 10:11 a.m.