[OpenLayers-Users] Mapserver labels, Google and WMS in one map

Tue Aug 29 12:22:36 CDT 2006

Hello,

What is the use of having google and wms in the same map? With Openlayers it
is yet not possible to get the two matching each other. That's what I have
understand from previous posts. 

Mit freundlichen Grüssen

Arnd Wippermann
http://gis.ibbeck.de/pinguinale/

-----Ursprüngliche Nachricht-----
Von: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org] Im
Auftrag von Erik Uzureau
Gesendet: Dienstag, 29. August 2006 01:33
An: José Vilson de Mello de Farias
Cc: users at openlayers.org
Betreff: Re: [OpenLayers-Users] Mapserver labels

On 8/28/06, José Vilson de Mello de Farias <vilson.farias at digitro.com.br>
wrote:
>
>  Greetings,
>
>    How does OpenLayers/Mapserver/WMS deals with labels? I made some 
> tests today and I realized that image tiles can bring undesired 
> effects to Mapserver labels. As a result, each tile has it's own 
> labels. The resulting map is crowded of useless and croped pieces of
labels.
>
>    Is there a workaround for this situation? I read something about 
> Ka-Map being an alternative for Mapserver deficiences related with 
> tiling. Is this a situation that ka-map solves?
>
>    I have other question, this time a Google Map question. Is it 
> possible to have to layers, one Mapserver WMS and other Google Maps in 
> the same map? I wrote a test code and it seems I can only have one of 
> these. The code is bellow :

Ola José. Yes it is possible to have WMS and Google layers in the same map.

The code of yours that you have placed below I assume does actually add both
layers to the map, but both as base layers. if you want your wms data to
appear as an overlay, you have to either add a transparent: true parameter
or directly set the isBaseLayer property to false.

ex:

    var wms = new OpenLayers.Layer.WMS("OpenLayers WMS",
"http://dgtad.dti.digitro.com.br:8080/mapserver_wms/wms", {layers:
'rio_grande_do_sul,limite_municipal, transparent: true'} );

 -- OR --

    var wms = new OpenLayers.Layer.WMS("OpenLayers WMS",
"http://dgtad.dti.digitro.com.br:8080/mapserver_wms/wms", {layers:
'rio_grande_do_sul,limite_municipal'} ); wms.isBaseLayer = false;

For more information on baselayers and overlays, see the following wiki:
http://trac.openlayers.org/wiki/BaseLayersAndOverlays

Best,
Erik

>
>  <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
> <html>  <head>
>    <script
> src="http://openlayers.org/api/2/OpenLayers.js"></script>
>    <script
>
src="http://maps.google.com/maps?file=api&amp;v=2&amp;key=ABQIAAAAa3W6Wyz6M2
grTpO8gp_f-xQyfmQrqwatIbt26NwwjFlL5q1_BRTeFkmJfyZiYU5zHNCsECyPQIFv-A"
> type="text/javascript"></script>
>    <script type="text/javascript"></script>
>    <title>Teste OpenLayers</title>
>  </head>
>  <body>
>  <div style="width: 100%; height: 100%;" id="map"></div>
>    <script defer="defer" type="text/javascript">
>      var map = new OpenLayers.Map('map');
>      var gmapLayer = new OpenLayers.Layer.Google("map");
>      var wms = new OpenLayers.Layer.WMS("OpenLayers WMS", 
> "http://dgtad.dti.digitro.com.br:8080/mapserver_wms/wms",
> {layers: 'rio_grande_do_sul,limite_municipal'} );
>      map.addLayer(wms);
>      map.addLayer(gmapLayer);
>      map.zoomToMaxExtent();
>    </script>
>  </body>
>  </html>
>
>
>  That's it, best regards and thanks in advance.
>
>
>
> --
>  José Vilson de Mello de Farias
>  Analista de Sistemas
>  SSE - Segurança Pública
>
>  DÍGITRO TECNOLOGIA
>  E-mail: vilson.farias at digitro.com.br
>  Messenger: vilsonfarias at hotmail.com
>  Fone: (0xx48) 3281-7314
>  Fax: (0xx48) 3281-7000
>  Site: www.digitro.com.br
> _______________________________________________
> Users mailing list
> Users at openlayers.org
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>
>
>

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