AW: [mapserver-users] Problem in extent using openlayers withMapserver

[Saka Royban]

Very very thanks. 
It worked fine.
but one strange point: Why they don't easily compute this maxRsolution in their 
lib using with of map element (instead of supposing all map elements to be in 
256*256 size)?
Anyway, your helpful point is totally appreciated. 




________________________________
From: Arnd Wippermann <arnd.wippermann at web.de>
To: Saka Royban <sakaroyban at yahoo.com>
Cc: users at openlayers.org
Sent: Thu, June 9, 2011 1:59:10 AM
Subject: AW: [mapserver-users] Problem in extent using openlayers withMapserver

  
when you request MapServer via Url, then Mapserver delivers  the image as 
defined by the mapfile (extent, imagesize) => resolution =  0.45.
 
If you request MapServer via OpenLayers.WMS, then the  mapoptions are the point. 
By default is the maxResolution = 1.40625 and the  other resolutions are 
maxResolution/2^zoom. (1.40625 , 0.703125, 0.3515625,  ...)
 
map.zoomToMaxExtent() uses the resolution = 
0.703125, because that is the best resolution to display maxExtent (-180,-90,180,90). For the next resolution the map would not display in whole.

 
You can set maxResolution=0.45 in the mapoptions.  Then the layer should fill 
the whole map.
 
Arnd



________________________________
 Von: mapserver-users-bounces at lists.osgeo.org  
[mailto:mapserver-users-bounces at lists.osgeo.org] Im Auftrag von Saka  Royban
Gesendet: Mittwoch, 8. Juni 2011 15:10
An: MapServer
Betreff: Re: [mapserver-users] Problem in extent using  openlayers withMapserver






----- Forwarded Message ----
From: Saka Royban  <sakaroyban at yahoo.com>
To: Stephen Woodbridge  <woodbri at swoodbridge.com>
Sent: Wed, June 8, 2011 5:38:17  PM
Subject: Re:  [mapserver-users] Problem in extent using openlayers with  
Mapserver


Thanks stephen for ur help (and sorry for bit abit latency in  reply)
I've already tried that, i.e. constructing map object without any  argument but 
no result.
In fact, in first step i created map without any  extra argument and faced that 
problem and after that i added some arguments to  maybe solve the problem.
Any idea now?




________________________________
 From: Stephen Woodbridge  <woodbri at swoodbridge.com>
To: mapserver-users at lists.osgeo.org
Sent: Sat, June 4, 2011 10:04:29  PM
Subject: Re:  [mapserver-users] Problem in extent using openlayers with  
Mapserver

try just using:

map = new OpenLayers.Map( 'map'  );

-Steve

On 6/4/2011 1:21 PM, Saka Royban wrote:
> Hi  all.
> I've really got stuck in this problem and need some help as i'm a  newbie
> using openlayers with mapserver.
> In mapfile i've set  output to be:
> EXTENT -180 -90 180 90 # Geographic
> SIZE 800  400
> IMAGECOLOR 128 128 255
>
> when i request mapserver  through URL, i recieve a complete 800*400
> image, but when i use  openlayers i get a 800*400 image which original
> map fills 512*256 of the  center and other pixels are filled with IMAGECOLOR.
> this is my  code:
> map = new OpenLayers.Map( 'map',{'tileSize': new
>  OpenLayers.Size(400,400)} );
> layer = new OpenLayers.Layer.MapServer(  "World Map",
> "http://localhost/cgi-bin/mapserv.exe",  {map:
> '/ms4w/apps/ms101/htdocs/ms101.map',layers:  'world_poly', height: 400,
> width: 800}, {singleTile: true}  );
>
> map.addLayer(layer);
>  map.zoomToMaxExtent();
>
> I asked this question in openlayers  mailing list with no success. It
> sounds it is related to  mapserver.
> Any help would be greatly appreciated
>
> Regards  (also sorry if my english is not very good)
>
>
>
>  _______________________________________________
> mapserver-users mailing  list
> mapserver-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapserver-users

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