Maps (MediaWiki extension)

Category:MediaWiki extension Maps (MediaWiki extension)
Extension name	Maps
About this article / disclaimer	This is not official documentation
Logo
Screenshot
Location of the main author	Gent, Belgium
Coordinates of the main authors	51.053829, 3.725012
Developers	Jeroen De Dauw, others
Licences
Description	Maps is a MediaWiki extension that provides the ability to visualize geographic data with dynamic, JavaScript based, mapping API's. It has built-in support for geocoding, displaying maps, displaying markers, adding pop-ups, and more.
Mediawiki requirements	1.17.* or higher for version 2.0, 1.21 alpha or higher or the 3.0 development version
Dependencies	ParamProcessor
Related extensions (documented here)	Semantic Maps
Related extensions
Discussion
Language support	Many
Status
First release date	2009/07/01
Last release date (as of 2013/08/22!)	2013/08/01
Last version number	2.0.1 (stable, 12/2012), 3.0 (alpha)
Programming language	PHP
Alternatives
Website	home page
Publications
Support websites	web site
Example websites	http://semantic-mediawiki.org/wiki/Maps
Last edited	2013/08/22

Introduction

Maps is a MediaWiki extension that provides the ability to visualize geographic data with dynamic, JavaScript based, mapping API's such as Google Maps and OpenLayers in your wiki pages. It has built-in support for geocoding, displaying maps, displaying markers, adding pop-ups, and more. Maps allows extensive customization of your maps, either per map, or via a general setting affecting all maps on your wiki. It is used by the Semantic Maps extension. (Maps, retrieved Aug 2013.

Geocoding

Geocoding allows to work with addresses instead of coordinates, i.e. geocoding can convert something like 40 boulevard du Pont d'Arve, Geneva into coordinates.

Live example:

{{#geocode:40 bd du Pont-d'Arve, Genève}}

gives: 46° 11' 41.77" N, 6° 8' 24.45" E

{{#geocode:location=40 bd du Pont-d'Arve, Genève|format=float}}

gives: 46.194937 N, 6.140124 E

{{#geocode:location=40 bd du Pont-d'Arve, Genève|format=float|directional=no}}

gives: 46.194937, 6.140124

See more example in the official manual

Displaying Maps V 3.x

In order to display map with one or more markers, you can either enter addresses that will be resolved by a geocoding service (see above) or coordinates.

One either can use a parser function or XML code.

Parser function:

{{#display_map:....}}

XML code:

<display_map>...</display_map>

Simple syntax example:

{{#display_map:<your location>|height=<some height>|service=<your service>|zoom=<zoom-level>}}

Read the official documentation, though there are new parameters which are not yet documented.

Parameters for #display_map

(under construction ....)

As of August 2013, parameters for #display_map (Maps version 3.0) are not yet officially documented, but look at Jeroen De Dauw list.

Some extra parameters (to be tested...)

Parameter name and aliases	explanation	values	Example(s)
Default (blank)	Define locations for markers	either an address or coordinates. Will figure out automatically what to do	Geneva 40 boulevard du Pont d'Arve, 1205 Genève, Suisse 40.7143528, -74.0059731
coords or location or address or addresses or locations or points	(not sure about this ...
width	Width of the Map		400px
height	Height of the Map		600px
center or centre
Services
geoservice	Identifies the geocoding service	geonames or google
mappingservice or service	Identifies the mapping service
Information and icons
title
label or text
icon
visitedicon
Drawings
lines
circles
polygones
rectangles
copycoords
User interface
wmsoverlay
maxzoom
minzoom
markercluster
Other
copycoords
static

Simple examples

Most basic use example (result not shown):

{{#display_map:Genève}}

{{#display_map:Geneva, Switzerland}}

Below are some simple examples using height and width and zoom parameters.

{{#display_map:Geneva, Switzerland|height=200px|width=400px|zoom=6}}

Loading map...

{"minzoom":false,"maxzoom":false,"mappingservice":"leaflet","width":"400px","height":"200px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"zoom":6,"defzoom":14,"layers":["OpenStreetMap"],"image layers":[],"overlays":[],"resizable":false,"fullscreen":false,"scrollwheelzoom":true,"cluster":false,"clustermaxzoom":20,"clusterzoomonclick":true,"clustermaxradius":80,"clusterspiderfy":true,"geojson":"","clicktarget":"","imageLayers":[],"locations":[{"text":"","title":"","link":"","lat":46.2017559,"lon":6.1466014,"icon":""}],"imageoverlays":null}

{{#display_map:Geneva, Switzerland|width=400px|service=openlayers}}

Loading map...

{"minzoom":false,"maxzoom":false,"mappingservice":"leaflet","width":"400px","height":"350px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"zoom":false,"defzoom":14,"layers":["OpenStreetMap"],"image layers":[],"overlays":[],"resizable":false,"fullscreen":false,"scrollwheelzoom":true,"cluster":false,"clustermaxzoom":20,"clusterzoomonclick":true,"clustermaxradius":80,"clusterspiderfy":true,"geojson":"","clicktarget":"","imageLayers":[],"locations":[{"text":"","title":"","link":"","lat":46.2017559,"lon":6.1466014,"icon":""}],"imageoverlays":null}

More examples

See

• Multiple points examples
• Layers examples

Other Maps parser functions

(to be documented)

Coordinates 	Formats coordinates 
Display map 	Simple map display without markers 
Distance 	Distance conversion 
Finddestination Finds the destination given a starting point
Geodistance 	Calculates the distance between two points

Installation and configuration

Installation

Installation for MW 1.22 or better

(since nov 2013)

1) Install composer as explained for example in the semantic MediaWiki article.

2) Cd to your mediawiki base installation directory (not the extensions !!)

3) If needed, remove the old extensions/maps directory

4) Type

composer require mediawiki/maps "*"

Installation prior to MW 1.22

In order to install a bleeding edge 3.0 alpha version, we did the following in this wiki:

• Upgrade PHP to 5.3.10 (i.e. the default in Ubuntu 12.04)
• Upgrade both the Wiki and all SMW extensions to developer (alpha) code

cd extensions:
git clone https://gerrit.wikimedia.org/r/p/mediawiki/extensions/DataValues.git
git clone https://gerrit.wikimedia.org/r/p/mediawiki/extensions/Validator.git
git clone https://gerrit.wikimedia.org/r/p/mediawiki/extensions/Maps.git

Configuration

You can use Maps out of the box. However, some services require API keys and according configuration settings in LocaSettings.php.

Google Maps JavaScript API keys

These are needed for some extra functionality like layers

• Read Getting Started at Google

( more to come ....)

Using OpenLayers as default geocoding service

In LocalSettings.php

• Sign up at http://api.geonames.org/
• Enable the account to use the free web services, i.e. click on the link at the bottom of that page
• In the LocalSettings.php file define $egMapsGeoNamesUser (after loading Maps)

$egMapsGeoNamesUser = YourUserName;

Problem:

Some addresses don't work as well as with Google (not that sure about this ...)

Debugging and troubleshooting

General MediaWiki debugging information

• Read How to debug MediaWiki at mediawiki.org

Bad use of parameters and values

Wrap <listerrors> </listerrors> around an expression. This will tell ParamProcessor to display errors

However, when I tried (15:42, 24 August 2013 (CEST)), I got a blank page.

Maps stop working without reason (i.e. code wasn't changed)

There are several possibilites

Probably you exceeded the amount of requests / hour with a geocoding or mapping service you can make.

You did upgrades. Be careful of dependencies, i.e. either use a stable version or upgrade everything all the time.

Memory limit exceeded. Check the webserver's error log (/var/log/apache2/error.log for example). You also can use less maps in a single page. This page did encounter memory limit problems and I moved maps to subpages ...

After editing page, you can't see contents.

Edit the page :)

Links

• https://semantic-mediawiki.org/wiki/User:Jeroen_De_Dauw/Describe
• https://semantic-mediawiki.org/wiki/User:Jeroen_De_Dauw/Mapsdoc