[OpenLayers-Users] Maxextent, resolution and zoom issue

[jbloc1878 at googlemail.com]

Hi, i have been struggling with this problem for some time now.

Basically I am trying to display two layers. 50k and 250K of the uk.  
Can anyone explain further what resolution, maxextent and zoom values  
I should have to display these layers correctly? My layers cover the  
whole of the UK. I have tried quite a few different values however I  
cannot make sense of how this works. The example I am referring to is  
below.

Thanks for any help in advance

Create an options object that holds a limited set of map resolutions  
and a maximum bounding extent to show the map. A new OS OpenSpace map  
object is created by passing in our 'map' HTML div element id and the  
map options.

1.      var options = {resolutions: [10, 5],
2.                    maxExtent: new OpenSpace.MapBounds(400000,  
100000, 450000, 150000) );
3.      osMap = new OpenSpace.Map('map', options);
We now set the centre of the map and set the initial map zoom level to  
1 (corresponding to the second defined layer in the resolutions array).

1.      osMap osMap.setCenter(new OpenSpace.MapPoint(400000,100000), 1);

Cheers


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