[OpenLayers-Users] Fixed Scales & minScale problem

[Alexandre Dube]

Ok, I tried this and it worked :

        olWFSRoads = new OpenLayers.Layer.WFS(
            "Routes - WFS", sMSURL,
            { typename: "BDGA_ROUTE_L_ARC", map: sBDGAMapPath },
            { extractAttributes: true,
              numZoomLevels: 2, scales: [25000, 10000],      // 
<----------------------------
              //minScale: 25000,
              typename: "BDGA_ROUTE_L_ARC", styleMap: oStyleMap
            }
        );

Is this a good workaround ?

Alexandre Dube wrote:
> I saw this in Layer.js at line 690 ( OL 2.6 )
>
> // Do not use the scales/resolutions at the map level if
> // minScale/minResolution and maxScale/maxResolution are
> // specified at the layer level
>
> Ok ?  But I want to use both.  I don't understand why we can't set a 
> minScale to a layer at the same time we specify our own scale ranges.  I 
> mean, I work for some of my layers and other not...  I'm confused !
>
> Is there a way around ?
>
> Alexandre
>
> Alexandre Dube wrote:
>   
>> Hi everybody,
>>
>>   I've got a strange behavior in my OL application.  I've got some 
>> layers with simple params like minScale/maxScale like the following :
>>
>> // layer
>>         olWFSRoads = new OpenLayers.Layer.WFS(
>>             "Routes - WFS", sMSURL,
>>             { typename: "BDGA_ROUTE_L_ARC", map: sBDGAMapPath },
>>             { extractAttributes: true, minScale: 25000,
>>               typename: "BDGA_ROUTE_L_ARC", styleMap: oStyleMap
>>             }
>>         );
>> // ----------------------------------------
>>
>>   I use the following map options :
>>
>> // old way
>>         var oMapOptions = {
>>             controls: [],
>>             units: 'm',
>>             maxResolution: 156543.0339,
>>             maxExtent: new OpenLayers.Bounds(
>>                 -1192709.604,
>>                 -204908.6926,
>>                 1172293.7082,
>>                 2338511.3665
>>             ),
>>             projection: new OpenLayers.Projection("EPSG:32198")
>>         };
>> // ----------------------------------------
>>
>>   I want to use more rounded scale numbers, like the following :
>>
>> // new way
>>
>>         var oMapOptions = {
>>             controls: [],
>>             units: 'm',
>>             maxResolution: 156543.0339,
>>             maxExtent: new OpenLayers.Bounds(
>>                 -1192709.604,
>>                 -204908.6926,
>>                 1172293.7082,
>>                 2338511.3665),
>>             projection: new OpenLayers.Projection("EPSG:32198"),
>>             numZoomLevels: 11,
>>             scales:  [13000000, 8000000, 4000000, 2000000, 
>> 1000000,                   // <---------------
>>                       500000, 250000, 100000, 50000, 25000, 10000]
>>         };
>> // ----------------------------------------
>>
>> The problem is, some of my layer loses their minScale value ( like the 
>> one above, olWFSRoads ).  It's changed to 13000000 as soon as it's added 
>> to the map !  I have an other WMS layer that does the same thing, and 
>> some others don't...  But they have the same params.
>>
>> Is this a bug or I'm missing something new when I set scales : [...] as 
>> a new map option ?
>>
>>   
>>     
>
>
>   


-- 
Alexandre Dubé
Mapgears
www.mapgears.com