osmdata (version 0.1.1)

add_osm_feature: Add a feature to an Overpass query

Description

Add a feature to an Overpass query

Usage

add_osm_feature(opq, key, value, key_exact = TRUE, value_exact = TRUE,
  match_case = TRUE, bbox = NULL)
add_feature(opq, key, value, key_exact = TRUE, value_exact = TRUE,
  match_case = TRUE, bbox = NULL)

Arguments

opq

An overpass_query object

key

feature key

value

value for feature key; can be negated with an initial exclamation mark, value = "!this", and can also be a vector, value = c ("this", "that").

key_exact

If FALSE, key is not interpreted exactly; see https://wiki.openstreetmap.org/wiki/Overpass_API

value_exact

If FALSE, value is not interpreted exactly

match_case

If FALSE, matching for both key and value is not sensitive to case

bbox

optional bounding box for the feature query; must be set if no opq query bbox has been set

Value

opq object

References

http://wiki.openstreetmap.org/wiki/Map_Features

Examples

# NOT RUN {
q <- opq ("portsmouth usa") %>%
                add_osm_feature(key = "amenity",
                                value = "restaurant") %>%
                add_osm_feature(key = "amenity", value = "pub") 
osmdata_sf (q) # all objects that are restaurants AND pubs (there are none!)
q1 <- opq ("portsmouth usa") %>%
                add_osm_feature(key = "amenity",
                                value = "restaurant") 
q2 <- opq ("portsmouth usa") %>%
                add_osm_feature(key = "amenity", value = "pub") 
c (osmdata_sf (q1), osmdata_sf (q2)) # all objects that are restaurants OR pubs
# Use of negation to extract all non-primary highways
q <- opq ("portsmouth uk") %>%
        add_osm_feature (key = "highway", value = "!primary") 
# }