The function checks for the availability of the PostGIS extension, and if it is available, but not installed, install it. Additionally, can also install Topology, Tiger Geocoder and SFCGAL extensions.

pgPostGIS(conn, topology = FALSE, tiger = FALSE, sfcgal = FALSE,
  display = TRUE, exec = TRUE)

Arguments

conn

A connection object (required, even if exec = FALSE).

topology

Logical. Whether to check/install the Topology extension.

tiger

Logical. Whether to check/install the Tiger Geocoder extension. Will also install extensions "fuzzystrmatch", "address_standardizer", and "address_standardizer_data_us" if all are available.

sfcgal

Logical. Whether to check/install the SFCGAL extension.

display

Logical. Whether to display the query (defaults to TRUE).

exec

Logical. Whether to execute the query (defaults to TRUE).

Value

TRUE if PostGIS is installed.

Examples

## 'exec = FALSE' does not install any extension, but nevertheless ## check for available and installed extensions:
# NOT RUN { pgPostGIS(con, topology = TRUE, tiger = TRUE, sfcgal = TRUE, exec = FALSE) # }