Map Styling Tools and Interactive maps on the web with OpenLayers - Addy Pope, GoGeo

OSM Workshop- Plan A OSM Workshop 2011 Who Themes Cloudmade QGIS Conclusions 0 60 Panic Openlayers Mapnik

What is EDINA
EDINA is a National Data Centre supported by JISC to provide resources to higher and further institutions.
OSM Workshop 2011 EDINA has extensive experience in delivering and manipulating spatial data and is an active member of the OSGeo foundation providing persistent test beds for various packages. GECO Geospatial Outreach and Community Outreach, EDINA coordinate this JISC funded project and aim to facilitate the use of geospatial data and tech beyond core user groups http://geco.blogs.edina.ac.uk/

Doing more with GIS/OpenLayers
We’ve seen what OSM is and how we can contribute data to it. Now lets look at what we might want to do with it.
OSM Workshop 2011

Something to work towards
http://bestofosm.org/
OSM Workshop 2011 This site showcases some of the best examples of OSM data/contributions around the world..... The UK looks a bit bare.

OSM - Pompeii OSM Workshop 2011

OSM - CERN OSM Workshop 2011

OSM - Bern OSM Workshop 2011

But there are some excellent examples of mapping detail from the UK that are not on the map.
OSM Workshop 2011

OSM – Edinburgh Zoo OSM Workshop 2011

OSM – Edinburgh Southside OSM Workshop 2011

Cloudmade OSM Workshop 2011 You will have seen the blue plus sign on the right hand side of the map window. This allows you to alter the look of the map. This is called altering the theme. Cloudmade is a company that spun out from OSM and they do consultancy work on and around OSM data. In addition they offer some neat tools for OSM.

Cloudmade OSM Workshop 2011 Cloudmade is a company that spun out from OSM and they do consultancy work on and around OSM data. In addition they offer some neat tools for OSM.

Cloudmade OSM Workshop 2011 Lets have a closer look at some of the themes that Cloudmade offer. To do this, we need to look at http://maps.cloudmade.com/

Cloudmade - themes OSM Workshop 2011

Cloudmade - Modify a theme
You can create your own theme using cloudmade.
Navigate to: http://maps.cloudmade.com/
To create your own style:
Sign up and login (they send you an email)
Click Edit Map Style
Browse the styles for one close to what you want and select it by clicking Clone Style (bottom right)
Then just select features from the Left Menu and alter colours using the pallet control
PLAY with Cloudmade
OSM Workshop 2011

Mapnik - Modify a theme
What we have been doing is using a GUI to alter a theme, the GUI then generates the code which renders the xml from the OSM database, a bit like a CSS for a webpage.
OSM Workshop 2011

Mapnik- Modify a theme
Mapnik allows you to render osm xml files directly.
OSM Workshop 2011
You can have a go at this if you fancy it. What you will need to do is:
Download mapnik – i tend to use the Mapnik bundled in OSGeo4W (http://www.mapnik.org/documentation/)
Find some examples to copy - http://wiki.openstreetmap.org/wiki/Mapnik_Example
Hack til you break it, then start again

Openlayers
is an open source JavaScript library for displaying map data in web browsers.
You will probably interacted and used Openlayers if you have used online mapping tools. In this section we will look at what you can do with Openlayers. http://openlayers.org/dev/examples/ OSM Workshop 2011

OpenLayers: Digimap
Digimap is a service run by EDINA that supplies maps to education institutes across Britain.
http://edina.ac.uk/digimap/ OSM Workshop 2011

OpenLayers - Examples
The Openlayers website has some excellent examples of the functionality that Openlayers offers.
You can view the code for each example and integrate it into your own mapping apps.
OSM Workshop 2011 http://openlayers.org/dev/examples/

OpenLayers - Code
Google overlay:
var map;
function init() {
map = new OpenLayers.Map({
div: "map",
allOverlays: true
});
var osm = new OpenLayers.Layer.OSM();
var gmap = new OpenLayers.Layer.Google("Google Streets", {visibility: false});
// note that first layer must be visible
map.addLayers([osm, gmap]);
map.addControl(new OpenLayers.Control.LayerSwitcher()); map.zoomToMaxExtent(); }
OSM Workshop 2011

But what if i want to have a map and put some of my own data onto in?
Not a problem we can use QGIS to do most of the hard stuff.
QGIS is a free, open source GIS package that runs on Window, Linux and Mac’s.
It is (relatively) easy and intuitive to use
There are loads of useful plugins that do neat things
There is an active user group developing tools
There are great demos and help pages to get you started
www.qgis.org
OSM Workshop 2011

QGIS - Recipe OSM Workshop 2011 http://www.flickr.com/photos/indieb0i/101943682/ Not mine, honest
Recipe
Take some data (kml/shp/GeoJSON)
Load into QGIS
Download OGR2Layer plugin
Run Data thru plugin
Integrate the code in your website
Pretend it was much harder than it was

Shameful Plug I OSM Workshop 2011 All the data that i am going to overlay on OSM is available through www.sharegeo.ac.uk ShareGeo is a spatial data repository fro open data

QGIS main screen Add vector layer Layer list Map Window IWMW 2011

Plugins IWMW 2011

OGR2Layer Set an output folder Set map size IWMW 2011

Output (OSM)
No coded written
Can add in attributes
Can apply styles to data in QGIS
Works in all good browsers (even IE, well, almost.........)
IWMW 2011

OpenLayers Code
<script src="http://www.openlayers.org/api/OpenLayers.js"></script>
<script type="text/javascript">
var map, selectsControls
function init(){
var option = {
projection: new OpenLayers.Projection("EPSG:900913"),
displayProjection: new OpenLayers.Projection("EPSG:4326")
};
map = new OpenLayers.Map('map', option);
olmapnik = new OpenLayers.Layer.OSM("OpenStreetMap", "http://tile.openstreetmap.org/${z}/${x}/${y}.png");
map.addLayer(olmapnik);
map.setBaseLayer(olmapnik);
var ls= new OpenLayers.Control.LayerSwitcher();
map.addControl(ls);
ls.maximizeControl();
map.addControl(new OpenLayers.Control.Scale());
var OGRGeoJSON_style = new OpenLayers.Style(
OpenLayers.Util.applyDefaults({
strokeColor: "${getStrokeColor}",
strokeOpacity: 1,
strokeWidth: "${getLineWidth}",
fillColor: "${getFillColor}",
fillOpacity: 1
}
//START QUERY OGRGeoJSON function onPopupCloseOGRGeoJSON(evt) { selectControl.unselect(selectedFeature); } function onFeatureSelectOGRGeoJSON(feature){ selectedFeature = feature; tableOGRGeoJSON="<html><meta http-equiv='Content-Type' content='text/html; charset=UTF-8'><body><table><tr><td>alignment:</td><td>"+feature.attributes.alignment+"</td></tr><tr><td>fcode:</td><td>"+feature.attributes.fcode+"</td></tr><tr><td>fillColor:</td><td>"+feature.attributes.fillColor+"</td></tr><tr><td>fillOpacity:</td><td>"+feature.attributes.fillOpacity+"</td></tr><tr><td>fontColor:</td><td>"+feature.attributes.fontColor+"</td></tr><tr><td>fontFamily:</td><td>"+feature.attributes.fontFamily+"</td></tr><tr><td>fontSize:</td><td>"+feature.attributes.fontSize+"</td></tr><tr><td>fontWeight:</td><td>"+feature.attributes.fontWeight+"</td></tr><tr><td>internal:</td><td>"+feature.attributes.internal+"</td></tr><tr><td><..........></td></tr></table></body></html>"; popup = new OpenLayers.Popup.FramedCloud("chicken", feature.geometry.getBounds().getCenterLonLat(), new OpenLayers.Size(1000,500), tableOGRGeoJSON, null, true, onPopupCloseOGRGeoJSON ); feature.popup = popup; map.addPopup(popup); } function onFeatureUnselectOGRGeoJSON(feature) { map.removePopup(feature.popup); feature.popup.destroy(); feature.popup = null; } //STOP QUERY OGRGeoJSON IWMW 2011

QGIS Demo
QGIS demo of OGR2Layer
http://www.qgis.org
OSM Workshop 2011

QGIS Demo
Quick maps that reveal worrying things....
OSM Workshop 2011

QGIS Demo
This time we add queryable attributes to less worrying data.
OSM Workshop 2011

Shameful plug II
You may wishto use OS Opendata, in which case you can access DigimapOpenstream
Grab the example code from OpenStream site
Copy the variables to the beginning of the script
Add a new OpenLayer.map to the index.html
Discover the projections dont match
Panic!
Find someone clever
Copy their code (function proj2.js)
IWMW 2011

Shameful plug II IWMW 2011

Useful Links
http://edina.ac.uk
http://edina.ac.uk/digimap/
http://www.gogeo.ac.uk/
http://openstream.edina.ac.uk/registration/
http://www.qgis.org
http://fwtools.maptools.org/
http://openlayers.org/dev/examples/
http://maps.cloudmade.com/
https://github.com/lucadelu/OGR2Layers/wiki/How-to-use
IWMW 2011

Campus Maps - Plan A IWMW 2011 Who Digimap ROAM Questions Conclusions 0 90 Confession Next Steps Practical

Practical
Onto the practical exercise
Familiarising yourself with Digimap ROAM
This should take around 30 minutes
Then we will look at what we can do with the output.
IWMW 2011

After the magic button?
Well, this is the bit has still to be decided and we want your help.
IWMW 2011

Theoretical process 1 Magic button may appear here.... IWMW 2011
Do some digitising – I would recommend that you theme your polygons. The colours are retained in the output so it makes it easier to re-interpret.
When you are happy with it, press the magic button
Get the code and load it into a GIS or load it into a web page through an API such as openlayers/google

What to do next?
Now we have digitised the buildings and grabbed the GeoJSON through the “magic button” what options are there?
Here we will outline 3 options:
Google Earth
Image files as output (for print or Google Earth)
OpenLayers dynamic map
There may be other options/needs. If you have any thoughts, we would like to hear them.
IWMW 2011

Google Earth
To get the annotations into Google Earth it is pretty easy. We need to convert the GeoJSON to KML
Using the ogr2ogr libraries:
ogr2ogr –f “KML” campusmap.kml input.geoJSON
IWMW 2011 OGR2OGR libraries available through FWTools http://fwtools.maptools.org/

Google Earth IWMW 2011

Case study
Campus maps for Edinburgh University
Requirements:
Make map that can be integrated into MobileCampus App
Define all university buildings as polygons
Link to attributes
Make maps which show uni building
Maps must be “lite” enough to deploy on mobile
IWMW 2011

Recipe – part 1
1 x IS intern
30 minute intro to Digimap ROAM
1 x copy of current campus map
1 x access to Google Streetview
2 x lunch time walks
1 – 2 days of digitising
http://www.flickr.com/photos/indieb0i/101943682/ Not mine, honest
Take intern and train on how to digitise, set intern loose and copy existing map, checking it is correct with google streetmap, Openstreetmap and ground truthing (lunchtime walks).
IWMW 2011

Recipe Part 2
Once you have the JSON, convert to shapefile format:
Ogr2ogr –f “ESRI SHAPE FILE” campusmap.shp input.geoJSON
Import into GIS and theme
Add basemap
Export to desired file format (png in this case)
Re-project png from OSGB to WGS84 for use in google maps.
IWMW 2011

Edinburgh Central Campus IWMW 2011

Kings Buildings IWMW 2011

Western General Hospital IWMW 2011

Easter Bush Issue with the buildings here, they are new and don’t appear on OS maps yet. IWMW 2011

Map Styling Tools and Interactive maps on the web with OpenLayers - Addy Pope, GoGeo

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Map Styling Tools and Interactive maps on the web with OpenLayers - Addy Pope, GoGeo Webinar Transcript