[OpenLayers-Users] AW: [mapserver-users] Problem in extent using openlayerswithMapserver

[Arnd Wippermann]

with 'maxResolution': 'auto' in the mapoptions, you should get what you
want.
 
Arnd

  _____  

Von: mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] Im Auftrag von Saka Royban
Gesendet: Donnerstag, 9. Juni 2011 17:04
An: MapServer
Betreff: Re: AW: [mapserver-users] Problem in extent using
openlayerswithMapserver


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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