[OSM-dev] Show Image of Data not Available where Tiles are Empty

[Mitja Kleider]

Am Freitag, den 09.07.2010, 01:38 +0200 schrieb Peter Körner: 
> Am 09.07.2010 00:07, schrieb PARVEEN ARORA:
> >   I am trying to show a default image of data not available or data
> > coming soon
> > where tiles are empty or not available with the help of following script:
> >
> > http://www.openstreetmap.org/openlayers/OpenStreetMap.js
> >
> > I have added this script to my index.html page
> > but this script is not working or i do not know how it can work
> > correctly.
> You can take a look at [1] where this script is used.

Just a short remark: OpenLayers.Layer.OSM is now part of OpenLayers 2.9,
utilizing OpenLayers.Layer.XYZ

http://dev.openlayers.org/releases/OpenLayers-2.9.1/doc/apidocs/files/OpenLayers/Layer/XYZ-js.html

You will still need to configure the empty tiles.

> > Is there any other way to show the default image in empty tiles ?
> > Please Help..
> 
> It seems this is done by the code snippet around 
> OpenLayers.Util.onImageLoadError. There is a if-switch that uses 
> this.src. to limit the error-image to tiles loaded from 
> *.openstreetmap.org. You could override this behaviour by putting a 
> <script />-Tag after the <script />-Tag that loads OpenStreetMap.js like 
> this:
> 
> <script type="text/javascript">
> OpenLayers.Util.onImageLoadError = function() {
>    this.src = "/url/to/your/error.png
> };
> </script>
> 
> 
> Peter
> 
> [1] <http://toolserver.org/~osm/styles/>


Mitja