{% extends "base.html" %}

{% block title %}Geocode to Commons{% endblock %}

{% block content %}
<div class="m-3">
<h1>Geocode coordinates to Commons Category</h1>

<ol>
<li>Overpass query to find OSM polygon that contain given lat/lon.</li>
<li>Sort list of OSM polygons by admin_level descending.</li>
<li>Check each polygon for wikidata tag, starting with highest admin_level first.</li>
<li>If the wikidata tag isn't found try looking for a 'ref:gss' tag and look for matching Wikidata item using the
Wikidata Query service (WDQS)</li>
<li>Finally try match by name. Look for nearby items with the same name using WDQS.</li>
<li>Return the most specific Wikidata QID and Commons Category.</li>
</ol>

<form>
Latitude/Longitude: <input name="q"/> (e.g. 54.375, -2.999) <input type="submit" value="go"/>
</form>

<p>Examples</p>

<ul>
{% for lat, lon, name in samples %}
<li><a href="detail?lat={{ lat }}&lon={{ lon }}">{{ name }}</a> ({{ lat }}, {{ lon }})
&mdash;
<a href="?lat={{ lat }}&lon={{ lon }}">API call</a></li>
{% endfor %}
</ul>

{% set repo = "https://git.4angle.com/edward/geocode" %}

<p>source code: <a href="{{ repo }}">{{ repo }}</a></p>
</div>

{% endblock %}