Ariadna

Is the open-source geocoder built on top of ElasticSearch for fast geocoding and provides better search for CIS countries

Work in progress. This may not work in your country. You are welcome for any issues, advices or other feedback

###What's a geocoder do anyway?

Geocoding is the process of transforming input text, such as an address, or a name of a place—to a location on the earth's surface.

It able to search:

• Street + housenumber
• Road intersections
• Points of interest
• Microdictricts
• Addresses in microdistricts
• Nearest villages and towns
• Search with auto replace from dictionary
• Reverse geocoding

... and a reverse geocoder, what's that?

Reverse geocoding is the opposite, it transforms your current geographic location in to a list of places nearby.

Prerequisites

• ElasticSearch
• PostgreSQL

Ariadna consists of 3 parts:

• Importer: OSM data importer to elastic search
• Updater: Download and import data
• WebUI for searching data
• Custom importer

Install

  git clone git@github.com:gen1us2k/osm-geogoder.git
  cd osm-geogoder
  make depends
  make

Configure

COMMANDS:
    import              Import OSM file to ElasticSearch
    update              Download OSM file and update index
    http                Run http server
    custom              Import custom data
    intersections       Process intersections only

GLOBAL OPTIONS:
   --config                                                                             Config file path
   --index_settings                                                                     ElasticSearch Index settings
   --custom_data                                                                        Custom data file path
   --es_index_name "addresses"                                                          Specify custom elasticsearch index name [$ARIADNA_ES_INDEX_NAME]
   --es_pg_conn_url "host=localhost user=geo password=geo dbname=geo sslmode=disable"   Specify custom PG connection URL [$ARIADNA_PG_CONN_URL]
   --es_url "http://localhost:9200"                                                     Custom url for elasticsearch e.g http://192.168.0.1:9200 [$ARIADNA_ES_HOST]
   --es_index_type "address"                                                            ElasticSearch index type [$ARIADNA_INDEX_TYPE]
   --filename "xxx"                                                                     filename for storing osm.pbf file [$ARIADNA_FILE_NAME]
   --download_url "xxx"                                                                 Geofabrik url to download file [$ARIADNA_DOWNLOAD_URL]
   --dont_import_intersections                                                          if checked, then ariadna won't import intersections [$ARIADNA_DONT_IMPORT_INTERSECTIONS]
   --help, -h                                                                           show help
   --version, -v                                                                        print the version

Elastic search index settings

cp index.json.example index.json

Change it for you

{
    "settings": {
        "analysis": {
            "filter": {
                "map_poi_filter": {
                    "type": "synonym",
                    "synonyms": [
                    	# all synonyms goes here
                    ]
                }
            },
            "analyzer": {
                "map_synonyms": {
                    "tokenizer": "standard",
                    "filter": [
                        "lowercase",
                        "map_poi_filter"
                    ]
                }
            }
        }
    },
    "mappings":
        {"address":
            {"properties":
                {
                    "centroid": {
                        "type": "geo_point" # need to reverse geocoding
                    }

                }
            }
        }
}

Usage

First import data. Download it from geofabrik.de and run

$ ./ariadna import

Or you can specify download_url and file_name into settings and run

$ ./ariadna update

This creates elasticsearch index

WebUI

$ ./ariadna http

Open http://localhost:8080 in your browser and enjoy

Http API

There is http api for geocode and reverse geocode

1. /api/search/:query
2. /api/reverse/:lat/:lon

Docker

To start Postgres, Elasticsearch and Ariadna run

$ cd ariadna-docker
$ cp ../index.json.example ./index.json
$ docker-compose up -d
$ docker-compose run --rm ariadna /go/bin/ariadna update

Open http://localhost:8080 in your browser and enjoy

TODO

• Remove pg for searching intersections
• Test search for other countries
• Write some tests

Roadmap

• Better code design
• Drop postgres dependency for searching crossroads
• Autocomplete
• More intelligent memory usage
• Add more sources for geocoding

Contributing

1. Fork it ( https://github.com/maddevsio/ariadna/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Pr, issues

You're welcome.

NOTE

Tested only for my city and my country.