Initialize a photon instance by creating a new photon object. This object is stored in the R session and can be used to perform geocoding requests.
Instances can either local or remote. Remote instances require nothing more
than a URL that geocoding requests are sent to. Local instances require the
setup of the photon executable, a search index, and Java. See
photon_local
for details.
Usage
new_photon(
path = NULL,
url = NULL,
photon_version = NULL,
country = NULL,
date = "latest",
exact = FALSE,
section = NULL,
opensearch = FALSE,
overwrite = FALSE,
quiet = FALSE
)
Arguments
- path
Path to a directory where the photon executable and data should be stored. Defaults to a directory "photon" in the current working directory. If
NULL
, a remote instance is set up based on theurl
parameter.- url
URL of a photon server to connect to. If
NULL
andpath
is alsoNULL
, connects to the public API under https://photon.komoot.io/.- photon_version
Version of photon to be used. A list of all releases can be found here: https://github.com/komoot/photon/releases/. Ignored if
jar
is given. IfNULL
, uses the latest known version.- country
Character string that can be identified by
countryname
as a country. An extract for this country will be downloaded. IfNULL
, downloads a global search index.- date
Character string or date-time object used to specify the creation date of the search index. If
"latest"
, will download the file tagged with "latest". If a character string, the value should be parseable byas.POSIXct
. Ifexact = FALSE
, the input value is compared to all available dates and the closest date will be selected. Otherwise, a file will be selected that exactly matches the input todate
.- exact
If
TRUE
, exactly matches thedate
. Otherwise, selects the date with lowest difference to thedate
parameter.- section
Subdirectory of the download server from which to select a search index. If
"experimental"
, selects a dump made for the master version of photon. If"archived"
, selects a dump made for an older version of photon. IfNULL
(or any arbitrary string), selects a dump made for the current release. Defaults toNULL
.- opensearch
If
TRUE
, looks for an OpenSearch version of photon in the specified path. Opensearch-based photon supports structured geocoding queries but is currently only experimental. Defaults toFALSE
. Seevignette("nominatim-import", package = "photon")
for details.- overwrite
If
TRUE
, overwrites existing jar files and search indices when initializing a new instance. Defaults toFALSE
.- quiet
If
TRUE
, suppresses all informative messages.
Examples
# connect to public API
photon <- new_photon()
# connect to arbitrary server
photon <- new_photon(url = "photonserver.org")
if (has_java("11")) {
# set up a local instance in the current working directory
photon <- new_photon("photon", country = "Monaco")
}
#> ℹ openjdk version "11.0.25" 2024-10-15
#> ℹ OpenJDK Runtime Environment Temurin-11.0.25+9 (build 11.0.25+9)
#> ℹ OpenJDK 64-Bit Server VM Temurin-11.0.25+9 (build 11.0.25+9, mixed mode)
#> ℹ Fetching photon 0.6.0.
#> ✔ Successfully downloaded photon 0.6.0. [676ms]
#>
#> ℹ Fetching search index for Monaco, created on latest
#> ✔ Successfully downloaded search index. [1.3s]
#>
#> • Version: 0.6.0
#> • Coverage: Monaco
#> • Time: latest