A JavaScript client making it easy to access the functionality on a Pelias geocoder without getting down and nerdy with the API details. Less coding, more geocoding.
Under heavy development. Standard forward geocoding and autocomplete are implemented, the rest will be coming soon.
[ circa 1993 underconstruction.gif ]
There is an NPM package with the same name, pelias-js
, so you can just:
yarn add pelias-js
and then in your JS file
import Pelias from 'pelias-js';
or, if you prefer to build from source:
yarn install
yarn build
pelias-js
expects a configuration object at time of instantiation, with the format:
{
peliasUrl: string,
apiKey: string /* optional */
}
where peliasUrl is a string containing the URL, with protocol and port, to your Pelias instance. If you are using a hosted Pelias-compatible service such as geocode.earth you will also need to provide an API key.
var client = new Pelias({peliasUrl: "http://YOUR_PELIAS_URL:4000"})
client.search
.setSearchTerm('ymca')
.setFocusPoint({lat: "45.523064", lon: "-122.676483"})
.execute()
.then((response) => {
console.log(response)
})
.catch((error) => {
console.log(error)
})
Full examples are in the examples
directory.
pelias-js
works wherever you write JS. It does use fetch
, however - if you'd like to use it in a Node environment, you'll
need to polyfill it. A quick-and-dirty implementation with node-fetch
might look like:
TypeScript:
(global as any).fetch = require('node-fetch')
Standard JS:
global.fetch = require('node-fetch')
pelias-js
implements all functionality that Pelias provides. The section below will provide examples and a short description
of each field, for full details please visit the official Pelias docs at: https://github.com/pelias/documentation/blob/master/search.md
Search implements a fluent interface, so chaining query terms is perfectly acceptable. The geocoder will perform the search
when the .execute()
function is invoked, e.g.
client.search
.setSearchTerm('ymca')
.setDataSources(['OA', 'OSM']
.execute()
Each set
function performs some basic validation on its input prior to actually sending the request to Pelias and will throw an Error if it fails.
execute()
returns a Promise that will resolve to the Pelias response. Non-200 responses will throw an Error.
The string to search for.
client.search
.setSearchTerm('ymca')
Restricts search results to a particular area. Takes a Who's On First gid
as a string, found using the Spelunker: http://spelunker.whosonfirst.org/
client.search
setBoundaryAdminArea("whosonfirst:region:85688585")
Accepts an object with a lat
, lon
, and radius
. This will restrict search results to a circle with radius
kilometers drawn around the specified coordinate.
client.search
setBoundaryCircle({lat: "45.523064", lon: "-122.676483", radius: 10})
Accepts a string with the alpha-2 or alpha-3 ISO-3166 country code.
client.search
setBoundaryCountry("GBR")
Accepts an object with a max_lat
, max_lon
, min_lat
, and min_long
and restricts search results to the area formed by this rectangle.
client.search
setBoundaryCircle({lat: "45.523064", lon: "-122.676483", radius: 10})
Filters search results by data source. Accepts an array of strings containing one or more of (case insensitive):
osm
(OpenStreetMap)oa
(OpenAddresses)wof
(Who's On First)gn
(GeoNames)
client.search
setDataSources(['OA', 'OSM'])
Sets a coordinate to use as a base location. Search results will be sorted, in part, by proximity to this point.
Accepts an object of form {lat
: string, lon
: string} with floating-point values.
client.search
setFocusPoint({lat: "01.2345", lon: "67.8901"}
Filters search results by place type, derived from Who's On First. Accepts an array of strings containing one or more of (case insensitive):
venue
points of interest, businesses, things with wallsaddress
places with a street addressstreet
streets,roads,highwaysneighbourhood
social communities, neighbourhoodsborough
a local administrative boundary, currently only used for New York Citylocaladmin
local administrative boundarieslocality
towns, hamlets, citiescounty
official governmental area; usually bigger than a locality, almost always smaller than a regionmacrocounty
a related group of counties. Mostly in Europe.region
states and provincesmacroregion
a related group of regions. Mostly in Europecountry
places that issue passports, nations, nation-statescoarse
alias for simultaneously using all administrative layers (everything except venue and address)
client.search
.setLayers(['address', 'borough'])
Limits number of results returned. Defaults to 10. Accepts an integer.
client.search
.setResultsLimit(10)
Autocomplete works nearly identically to search
. As it is meant to be used in UI elements,
requests are throttled to one per 500ms. Not all search fields are included, however, only:
- term
- focus point
- boundary country
- boundary rectangle
- data sources
- layers
Official Pelias docs are at: https://github.com/pelias/documentation/blob/master/autocomplete.md
client.autocomplete
.setLayers(['address', 'borough'])
.setSearchTerm('ymca')
.setFocusPoint({lat: "45.523064", lon: "-122.676483"})
.execute()
When you know an identification number and the source it came from, you can use Pelias to get details on the location.
Official Pelias docs are at: https://github.com/pelias/documentation/blob/master/place.md
client.place
.setIds(['openstreetmap:venue:relation/9194723'])
.execute()
GPLv3