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27
README.md
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27
README.md
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# GeoBlog Plugin
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This plugin scans for `Location: <latitude>, <longitude>` metadata in articles and displays them on a map using the included `archives.html` template. It also writes `articles.gpx` and `articles.kml` files with the same information for offline GPS devices and Apps.
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## Installation
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Copy the `geoblog` folder to your local Pelican plug-ins folder and activate the plug-in in your `pelicanconf.py` file:
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```
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PLUGINS = ['geoblog']
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```
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Copy the `archives.html` file to your Pelican theme's `templates` folder.
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If you want to use it for `categories` or other `index.html` derived template files, make sure to adjust the loop accordingly:
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```
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{% for article in articles %}
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```
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## Use
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Add location coordinates as decimal latitude and longitude values to your article metadata header. The map will display markers that show a pop up with the clickable title of the article when clicked.
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```
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Location: 12.009621864420991, 79.81141615530888
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```
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geoblog/__init__.py
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geoblog/__init__.py
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from .geoblog import *
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81
geoblog/geoblog.py
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geoblog/geoblog.py
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from pelican import signals
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from xml.dom import minidom
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settings = {}
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collection = {}
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gpx_root = '''<?xml version="1.0" encoding="UTF-8"?>
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<gpx xmlns="http://www.topografix.com/GPX/1/1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd" version="1.1" creator="nfc.flux.vision"></gpx>'''
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kml_root = '''<?xml version="1.0" encoding="UTF-8"?>
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<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2"><Document><Folder></Folder></Document></kml>'''
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def init(self):
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settings['files'] = self.settings.get('OUTPUT_PATH')
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def generate_latlon(generator):
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for article in generator.articles:
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if "location" in article.metadata:
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lat, lon = [float(i) for i in article.metadata['location'].replace(' ', '').split(',')]
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article.metadata['lat'] = lat
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article.metadata['lon'] = lon
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def make_files(void):
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print(collection)
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makeGPX()
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makeKML()
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def makeKML():
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if len(collection) > 0:
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root = minidom.parseString(kml_root)
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folder = root.createElement('name')
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foldername = root.createTextNode( 'articles' )
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folder.appendChild( foldername )
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root.childNodes[0].childNodes[0].childNodes[0].appendChild( folder )
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for place in collection:
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placemark = root.createElement('Placemark')
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name = root.createElement('name')
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title = root.createTextNode( collection[place]['name'] + ' (' + collection[place]['url'] +')')
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name.appendChild( title )
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placemark.appendChild( name )
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point = root.createElement('Point')
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coordinates = root.createElement('coordinates')
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lat, lon = collection[place]['coordinates'].replace(' ', '').split(',')
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latlon = root.createTextNode( lon + ',' + lat)
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coordinates.appendChild( latlon )
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point.appendChild( coordinates )
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placemark.appendChild( point )
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root.childNodes[0].childNodes[0].childNodes[0].appendChild( placemark )
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with open(settings['files'] + '/articles.kml', 'w') as xml_file:
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root.writexml(xml_file, indent="", addindent=" ", newl='\n')
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def makeGPX():
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if len(collection) > 0:
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root = minidom.parseString(kml_root)
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for place in collection:
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lat, lon = collection[place]['coordinates'].replace(' ', '').split(',')
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wpt = root.createElement('wpt')
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wpt.setAttribute('lat', lat)
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wpt.setAttribute('lon', lon)
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name = root.createElement('name')
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title = root.createTextNode( collection[place]['name'] + ' (' + collection[place]['url'] +')' )
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name.appendChild( title )
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wpt.appendChild( name )
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root.childNodes[0].appendChild( wpt )
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with open(settings['files'] + '/articles.gpx', 'w') as xml_file:
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root.writexml(xml_file, indent="", addindent=" ", newl='\n')
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def geodata(generator):
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for article in generator.articles:
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if "location" in article.metadata:
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collection.update({
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article.slug : {
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"url" : generator.settings['SITEURL'] + '/' + article.url,
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"name": article.title,
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"coordinates": article.metadata["location"],
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}
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})
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def register():
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signals.initialized.connect(init)
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signals.article_generator_finalized.connect(generate_latlon)
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signals.article_generator_finalized.connect(geodata)
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signals.finalized.connect(make_files)
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templates/archives.html
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templates/archives.html
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<!DOCTYPE html>
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<html lang="{{ DEFAULT_LANG }}">
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<head>
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<base target="_top">
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>{{ SITENAME }}</title>
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<link rel="shortcut icon" type="image/x-icon" href="/images/favicon.ico" />
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<link rel="stylesheet" href="{{ SITEURL }}/theme/local.css">
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<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.3/dist/leaflet.css" integrity="sha256-kLaT2GOSpHechhsozzB+flnD+zUyjE2LlfWPgU04xyI=" crossorigin=""/>
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<style>
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html, body { height: 100%; margin: 0; padding: 0; }
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#map {
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height: 100%;
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width: 100vw;
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}
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#map img {
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border: none
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}
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.info {
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padding: 6px 8px;
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background: white;
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background: rgba(255,255,255,0.8);
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box-shadow: 0 0 15px rgba(0,0,0,0.2);
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border-radius: 5px;
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}
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.info h4 {
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font-size: 1.6em;
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margin: 0 0 5px;
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color: #777;
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}
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.info span {
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line-height: 18px;
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vertical-align: top;
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}
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</style>
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<script src="https://unpkg.com/leaflet@1.9.3/dist/leaflet.js" integrity="sha256-WBkoXOwTeyKclOHuWtc+i2uENFpDZ9YPdf5Hf+D7ewM=" crossorigin=""></script>
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</head>
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<body>
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<script>
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var mapArticles = {
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"type": "FeatureCollection",
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"title": "{{ SITENAME }}",
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"features": [
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{% for article in dates %}
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{% if article.metadata['lat'] and article.metadata['lon'] %}
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{
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"type": "Feature",
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"id": "{{ article.slug }}",
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"geometry": {
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"type": "Point",
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"coordinates": [{{ article.metadata['lon'] }}, {{ article.metadata['lat'] }}]
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},
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"properties": {
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"title": "{{ article.title }}",
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"url": "{{ SITEURL }}/{{ article.url }}"
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},
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},
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{% endif %}
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{% endfor %}
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]
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};
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</script>
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<div id='map'></div>
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<script>
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const showArticles = L.geoJSON(mapArticles, {
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pointToLayer(feature, latlng) { return L.marker(latlng);},
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onEachFeature
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});
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const map = L.map('map').fitBounds(showArticles.getBounds());
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const tiles = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
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maxZoom: 19,
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attribution: '© <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
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}).addTo(map);
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showArticles.addTo(map);
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function onEachFeature(feature, layer) {
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let popupContent = ``;
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if (feature.properties && feature.properties.title) {
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popupContent += '<a href="'+feature.properties.url+'">' + feature.properties.title + '</a>';
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}
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layer.bindPopup(popupContent);
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}
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var info = L.control({position: 'topright'});
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var download = L.control({position: 'bottomleft'});
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info.onAdd = function (map) {
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this._div = L.DomUtil.create('div', 'info'); // create a div with a class "info"
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this._div.innerHTML = '<h4>' + mapArticles["title"] + '</h4>';
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return this._div;
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};
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download.onAdd = function (map) {
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this._div = L.DomUtil.create('div', 'info'); // create a div with a class "info"
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this._div.innerHTML = 'Download <a href="{{ SITEURL }}/articles.gpx">GPX</a> <a href="{{ SITEURL }}/articles.kml">KML</a>';
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return this._div;
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};
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info.addTo(map);
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download.addTo(map);
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</script>
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</body>
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</html>
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