Difference between revisions of "Widget:OpenStreetMap"

Revision as of 05:53, 9 April 2012

This widget allows you to embed OpenStreetMap in a wiki page.

Using this widget

You can insert a map with the following wiki code:

{{#widget:OpenStreetMap|lat=52.94762|lon=-1.1467897|zoom=16}}

Parameters

width: Width of the embedded map (default 400px).
height: Height of the embedded map (default 400px).
lat: The x-coordinate for the centre of the view.
lon: The y-coordinate for the centre of the view.
units: The type of map units used for the coordinates (defaults to 'degrees').
zoom: The zoom level (default 15).
showmarker: Adds a visual marker to the center of the map (default false).
showmouseposition
Displays the position of the mouse cursor in map coordinates.

Points of interest

poifile: Specifies the url of a file containing points of interest (POI) that should be overlaid on the map. See the file format description in [1]. Note: there is a bug that causes the last line of the poi file to be ignored; a workaround is to add a trailing line with a single '.' character.
poititle: The title of the POI layer (default 'Points of interest').

Storing points of interest on a wiki page

Instead of uploading a file you can add the points of interest to a wiki page and link to the raw page text, for example:

{{#widget:OpenStreetMap|...|poifile={{fullurl:Wiki page title|action=raw&templates=expand&ctype=text/plain}} }}

Note: If you change the contents of that wiki page you must purge the page cache (for each page that uses it in a map) before you can see the change.

Overlay a path

You can draw paths using connected line segments. This is useful for showing routes. Each path should have a unique name. For the parameters described below the placeholder '<id>' should be replaced with the name of the path.

path.<id>.title: Gives a title to the overlay (default "Route")
path.<id>.point.lat: Adds the latitude of a point to the path. You can specify this parameter many times to add all of the points to the path.
path.<id>.point.lon: Adds the longitude of a point to the path. You must specify this parameter the same number of times as the 'lat' parameter.
path.<id>.colour: Sets the colour to draw the path (default "#0033cc")
path.<id>.opacity: Sets the path opacity, in the range [0-1] (default 1)
path.<id>.width: Sets the line width (default 4)

Javascript alternatives

These alternatives can be used to cater for browsers that do not support javascript.

alt_image: The url of an image to represent the map.
alt_text: A description of the alt_image.

Example

@@ Line 82: / Line 82: @@
     var mapUnits = '<!--{$units|escape:'quotes'|default:'degrees'}-->';
     var epsg4326 = new OpenLayers.Projection('EPSG:4326');
+    var movemap = new OpenLayers.Control.Navigation({
+    > 'zoomWheelEnabled': false});
+    movemap.disableZoomWheel();
     // add the openstreetmap layer
@@ Line 87: / Line 93: @@
        units: mapUnits,
        controls: [
-          new OpenLayers.Control.Navigation(),
+          new OpenLayers.Control.Navigation({'zoomWheelEnabled': false}),
           new OpenLayers.Control.ArgParser(),
           new OpenLayers.Control.PanZoomBar(),
@@ Line 106: / Line 112: @@
     map.setCenter(centerPt, zoom);
+   // make sure mouse wheel zooming is disabled
+   controls = map.getControlsByClass('OpenLayers.Control.Navigation');
+   for(var i = 0; i < controls.length; ++i)
+      controls.disableZoomWheel();
     <!--{if $showmarker eq 'true'}-->