[mapserver-users] MAXSCALEDENOM [scale_field]

[Daniel Degasperi]

Even if I use the scale denominator I have to repeat the class for each 
category for every priority.
The style of each category remain still the same, which means I have a 
lot of duplicated classes.

Daniel

Am 15/07/2010 20:03, schrieb Lime, Steve D (DNR):
> I wonder if you could access the current computed scale denominator in expression (or the DATA statement) and get the same effect...
>
> e.g.:
>
>    CLASS
>       EXPRESSION ('[category]' eq 'poi'&&  [priority]<  SCALE)
>       ...
>    END
>
> Steve
>
>
>
> -----Original Message-----
> From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Daniel Degasperi
> Sent: Thursday, July 15, 2010 5:02 AM
> To: Lime, Steve D (DNR)
> Cc: mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] MAXSCALEDENOM [scale_field]
>
> Hi Steve,
> maybe it's easier to explain with a mapfile example:
>
> LAYER
>       NAME "POI"
>       TYPE POINT
>       CONNECTIONTYPE postgis
>       CONNECTION "user=somebody password=something dbname=test
> host=localhost"
>       DATA "the_geom FROM (SELECT gid, category, priority, the_geom FROM
> poi) AS foo USING UNIQUE gid"
>       ...
>       CLASS
>           EXPRESSION ('[category]' eq 'poi')
>           MAXSCALEDENOM [priority]
>           ...
>       END
>       ...
> END
>
> In this case I've one single class  for each category and the
> MAXSCALEDENOM get the value from the priority attribute of my datasource.
> As it is now, MapServer does not support this feature and I've to repeat
> every single category for each different priority value.
>
> Best regards,
> Daniel
>
>
> Am 14/07/2010 23:53, schrieb Lime, Steve D (DNR):
>    
>> MapServer doesn't support layer-level binding only feature-level binding. I'm having trouble seeing the value. Can you explain further?
>>
>> Steve
>> ________________________________________
>> From: mapserver-users-bounces at lists.osgeo.org [mapserver-users-bounces at lists.osgeo.org] On Behalf Of Daniel Degasperi [daniel.degasperi at r3-gis.com]
>> Sent: Wednesday, July 14, 2010 7:54 AM
>> To: mapserver-users at lists.osgeo.org
>> Subject: [mapserver-users] MAXSCALEDENOM [scale_field]
>>
>> Hi,
>> I've tried to read the MAXSCALEDENOM value from a attribute in my
>> datasource, but mapserver throw's a parsing error.
>> Probably because such feature does not exist in mapserver.
>>
>> Are there any intentions to implement this?
>> It could be interesting for layers, whose data has different priorities
>> but the same styling.
>> With this feature I can avoid repeating the classes for every priority.
>>
>> Best regards,
>> Daniel
>> _______________________________________________
>> mapserver-users mailing list
>> mapserver-users at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>
>>      
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