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<!DOCTYPE html>
<html>
<head>
<title>Leaflet Soton - Documentation</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<style>
/* Adapted from a stylesheet by Edward O'Connor */
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h1, h2, h3, h4, h5, h6 {
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h5 { font-size: 1.125em; line-height: 1.167; }
h6 { font-size: 1em; line-height: 1.3125; }
</style>
<link rel="stylesheet" href="../src/leaflet-soton.css" />
<link rel="stylesheet" href="../resources/leaflet/dist/leaflet.css" />
<script type="text/javascript" src="../resources/syntaxhighlighter/pkg/scripts/shCore.js"></script>
<script type="text/javascript" src="../resources/syntaxhighlighter/pkg/scripts/shBrushJScript.js"></script>
<script type="text/javascript" src="../resources/syntaxhighlighter/pkg/scripts/shBrushXml.js"></script>
<link type="text/css" rel="stylesheet" href="../resources/syntaxhighlighter/pkg/styles/shCoreDefault.css"/>
<script type="text/javascript">SyntaxHighlighter.all();</script>
</head>
<body>
<h1>An Introduction to OpenStreetMap and the University of Southampton</h1>
Full page map examples
<ul>
<li><a href="basic.html">Basic</a></li>
<li><a href="full.html">Full</a></li>
<li><a href="indoor.html">Indoor</a></li>
<li><a href="workstations.html">Workstations</a></li>
<li><a href="zepler.html">Zepler</a></li>
<li><a href="vendingmachines.html">Vending Machines</a></li>
<li><a href="cycleparkingheatmap.html">Cycle Parking Heatmap</a></li>
<li><a href="bus.html">Bus Routes</a></li>
<li><a href="catering.html">Catering</a></li>
<li><a href="teachingrooms.html">Teaching Rooms</a></li>
</ul>
<h2>OpenStreetMap</h2>
<table>
<tr>
<td>
<p>
The OpenStreetMap project was started in 2004 with the aim of
creating a free map of the world. The core, but perhaps less
obvious output from the project is the data. You can see an
example of some OSM data, represented in XML on the right.
</p>
<p>
This abreviated data describes the Zepler building on Highfield
Campus. You can see in the tags, that the building name,
number, and uri are present.
</p>
</td>
<td>
<script type="syntaxhighlighter" class="brush: xml"><![CDATA[
<?xml version='1.0' encoding='UTF-8'?>
<osm version='0.6'>
<node id='304648094' lat='50.9371225' lon='-1.397536' />
<node id='304648184' lat='50.9375162' lon='-1.3976054' />
...
<node id='2628668610' lat='50.9371174' lon='-1.3976749' />
<way id='27743656'>
<nd ref='1550130370' />
...
<nd ref='1550130274' />
<nd ref='1550130370' />
<tag k='building' v='yes' />
<tag k='loc_ref' v='59' />
<tag k='name' v='Zepler' />
<tag k='uri' v='http://id.southampton.ac.uk/building/59' />
</way>
</osm>
]]></script>
</td>
</tr>
</table>
<h2>Slippy Maps</h2>
<table>
<tr>
<td>
<img src="http://a.tile.openstreetmap.org/16/32513/21958.png" />
</td>
<td>
<h3>Data to Images (or Tiles)</h3>
<p>
XML is perhaps not the best way to view the data if you want to
use if for navigation, so this data can be rendered in to
images for use in a map. Shown here is the "Standard" rendering
of part of Highfield campus.
</p>
<p>
This tile has been downloaded from the OpenStreetMap tile
servers. A tileserver is normally composed of a database
(usually postgresql with postgis), a tile rendering stack
(e.g. renderd and mapnik) and a webserver (e.g. apache with
mod_tile).
</p>
</td>
</tr>
<tr>
<td>
<h3>Leaflet</h3>
<p>
There are a few libraries that can handle displaying a "slippy"
map, the one in use here is called leaflet. Tiles like the one
shown above are combined together in to a grid that can be
moved with the mouse.
</p>
<p>
The javascript used to create the map seen on the right is shown below.
</p>
<pre class="brush: js;">
var map1 = L.map('zepler-osm');
map1.setView([50.93733, -1.39779], 19);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
maxZoom: 19
}).addTo(map1);
</pre>
</td>
<td>
<div id="zepler-osm" style="height: 500px; width: 100%;"></div>
</td>
</tr>
</table>
<h2>Custom Maps for the University</h2>
<table>
<tr>
<td>
<div id="sum-carto" style="height: 500px; width: 600px;"></div>
</td>
<td>
<h3>Custom Rendering (sum-carto)</h3>
<p>
Jumping back to tileservers, the rendering stack decides how to
display the data as an image. Mapnik, which is commonly used
has an xml stylesheet that it uses, this can be (and in the
case of the "Standard" OSM style, is) generated from another
CSS like language called carto.
</p>
<p>
The "Standard" OSM rendering has some disadvantages for the
University. Probably the biggest is that it shows some
irelevent things, e.g. housenumbers for the surrounding
residential area, it also does not show relevent things e.g.
building numbers, cycle parking, ...
</p>
<p>
To the left, you can see the same view as before, but this
time, the data has been rendered according to a different
stylesheet. Notice that the buildings number is displayed
below the name, and that some cycle parking is shown just to
the top right of the Zepler building (green P).
</p>
<p>
Currently there are two tileservers hosting this University
specific tileset. Inside ECS there is
kanga-cb15g11.ecs.soton.ac.uk, which is updated daily. Outside
of ECS, there is bus.southampton.ac.uk.
</p>
<pre class="brush: js;">
var map2 = L.map('sum-carto');
map2.setView([50.93733, -1.39779], 19);
L.tileLayer('http://bus.southampton.ac.uk/graphics/map/tiles/{z}/{x}/{y}.png', {
maxZoom: 19
}).addTo(map2);
</pre>
</td>
</tr>
</table>
<h2>Interactivity</h2>
<table>
<tr>
<td>
<h2>leaflet-soton</h2>
<p>
So far we have seen static maps, and slippy maps. But extra
interactivty can be used to enhance slippy maps with more data
where available. The University is off to a good start with
this data, and some of it can be interacted with through the
map.
</p>
<p>
The <a href="https://sourcekettle.ecs.soton.ac.uk/project/leaflet-soton/">
leaflet-soton</a> library allows you to add this
interactivity to the map with ease, its mainly clientside, with
a small server side component. It handles everything from
setting up Leaflet, to advanced interactive components.
</p>
<p>
Try clicking on the buildings and the bicycle parking.
</p>
<pre class="brush: js;">
var map3 = LS.map('sum-basic');
</pre>
</td>
<td>
<div id="sum-basic" style="width: 100%; height: 500px;"></div>
</td>
</tr>
<tr>
<td>
<div id="sum-workstations" style="width: 100%; height: 500px;"></div>
</td>
<td>
<h3>Workstations</h3>
<p>
One of the very useful pieces of information published by the
University is the workstation use data. On the left you can see
this being displayed on the map.
</p>
<p>
As you zoom in and out, the workstation markers will group
together and split apart to keep the data visible. All markers
are also interactive and display more data in a popup when
clicked on.
</p>
<pre class="brush: js;">
var map4 = LS.map('sum-workstations', {
workstations: true
});
</pre>
</td>
</tr>
</table>
<h2> Future Experimental Features</h2>
<table>
<tr>
<td>
<h3>Indoor Maps</h3>
<p>
Navigating around the University is slightly different from
navigating around a city, e.g. Southampton or London. Most of
navigation for students and staff of the university involves
moving between rooms.
</p>
<p>
The leaflet-soton library also has an experimental indoor feature, you
can see a view of the library (level 2) on the left.
</p>
</td>
<td>
<div id="sum-indoor" style="width: 600px; height: 500px;"></div>
</td>
</tr>
</table>
<script src="../resources/leaflet/dist/leaflet-src.js"></script>
<script src="../resources/leaflet-markercluster/dist/leaflet.markercluster.js"></script>
<script src="../resources/leaflet-indoor/leaflet-indoor.js"></script>
<script src="../src/leaflet-soton.js"></script>
<script type="text/javascript">
LS.dataPath = '../data.json';
LS.imagePath = '../resources/images/';
var map1 = L.map('zepler-osm').setView([50.93733, -1.39779], 19);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
maxZoom: 19
}).addTo(map1);
var map2 = L.map('sum-carto').setView([50.93733, -1.39779], 19);
L.tileLayer('http://bus.southampton.ac.uk/graphics/map/tiles/{z}/{x}/{y}.png', {
maxZoom: 22
}).addTo(map2);
var map3 = LS.map('sum-basic');
var map4 = LS.map('sum-workstations', {
workstations: true
});
var map5 = LS.map('sum-indoor', {
workstations: true,
indoor: true,
center: [50.93471, -1.3957],
zoom: 20,
level: "2"
});
</script>
</body>
</html>
|