I'll try to create a simple example. I was comparing AGG PNG with Cairo 
PNG, but I think the Cairo vector output has the same problem.

Andy

Dane Springmeyer wrote:
> Hi Andy,
> 
> I assume you are comparing halos between the AA AGG output and vector 
> output of Cairo?
> 
> I've also noted an apparent difference in Halo size, but have not had 
> time to develop a test case (one part of which would be comparing AGG 
> png output to Cairo PNG output).
> 
> If you could prepare a simple test case and attach to a ticket I'll try 
> to take a look at this in more detail.
> 
> I agree that manually changing radius values in your XML is not optimal.
> 
> Dane
> 
> 
> On Sep 19, 2009, at 10:31 AM, Andrew Ayre wrote:
> 
>> I'm using the OSM stylesheet and switching from AGG to Cairo. I've
>> noticed that the halos generated by Cairo are smaller than the ones
>> generated by AGG.
>>
>> For example if I increase the halo radius from 2 (used with AGG) to 6,
>> then I can get roughly the same effect from Cairo.
>>
>> Is there a shortcut to doing this somewhere or do I have to manually
>> change all the HaloRadius fields in my XML file?
>>
>> thanks, Andy
>>
>> -- 
>> Andy
>> PGP Key ID: 0xDC1B5864
>> _______________________________________________
>> Mapnik-users mailing list
>> [email protected]
>> https://lists.berlios.de/mailman/listinfo/mapnik-users
> 
> 
> 

-- 
Andy
PGP Key ID: 0xDC1B5864
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