Geocoding in applications

What is geocoding?

Converting text description into GPS coordinates

What is geocoding?

Converting text description into GPS coordinates

Why use it?

1. Show location on map
2. Spatial analysis
   • Route planning
   • Delivery coverage
   • Geomarketing, insurance, big data, etc

Reverse geocoding

Converting GPS location into human readable text

Geocoding services

1. Google Maps
2. HERE (Nokia) Maps
3. OpenStreetMap based:
   • Nominatim - MapQuest, osm.org
   • navidata.pl - geocoding in Poland

API calls - Nominatim

            http://nominatim.openstreetmap.org/search?q=warszawa,jerozolimskie 91&format=json
            



                [{

                "lat":"52.226866",

                "lon":"20.9991864510345"

                "display_name":"91, Aleje Jerozolimskie, Kolonia Staszica, Ochota, Warszawa, województwo mazowieckie, 02-006, Polska"

                }]



            

API calls - NaviData

            http://api.navidata.pl/geocode?q=warszawa,jerozolimskie 91
            



                [{


                 "lat": 52.2268660010955, 

                 "lon": 20.9991863955474,

                 "description": "Aleje Jerozolimskie 91, Warszawa, woj. mazowieckie"


                }]


            

LeafletJS - leafletjs.com

LeafletJS - API

<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css" >

<script src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"></script>
            
            

LeafletJS - API

<div align="center" id="map" style="width:50%" ></div>


            
            

LeafletJS - API

var map = L.map('map').setView([52.2321, 21.0127], 14);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png',
    {maxZoom: 18}).addTo(map);

var marker = L.marker([52.2321, 21.0127]).addTo(map);
            
            

LeafletJS - API

LeafletJS - API

var circle = L.circle([52.2321, 21.0127], 1000, {
    color: 'red',
    fillColor: '#f03',
    fillOpacity: 0.3
}).addTo(map);

            
            

LeafletJS - API

LeafletJS - API

    function search() {
    adres = document.getElementById("adres").value;
      if ( adres.length == 0 ) { return ;}
      $.getJSON("http://api.navidata.pl/geocode",
     { q :  adres  }, szukaj_callback);
     }
            

LeafletJS - API

    function search_callback(data) {
      position = L.latLng([dane[0].lat, dane[0].lon]);
      company = L.latLng([52.2321, 21.0127]);
      marker.setLatLng(position);
      map.setView(position, 14);
      distance = position.distanceTo(company);
      marker.bindPopup('Distance:' + Math.round(distance) + 'm');
      marker.togglePopup();
                }

            

LeafletJS - API

Thank you for your attention :)