Re: [Mapnik-users] Output Format

[Dane Springmeyer]

Chris,




[world]
type=Mapnik
mapfile=/path/to/mapfile.xml
extension=png256

Dane

What about the attached patch to enable setting the mapnik output format to 'png256' using a TileCache config like:

Mapnik_Layer_8bit_support.patch
Description: Binary data

On Oct 17, 2008, at 4:29 AM, Christopher Schmidt wrote:

On Fri, Oct 17, 2008 at 04:07:16AM -0700, spillocaster wrote:

Hi list,


I used a XML-configuration (based on the

I have defined a very nice map with MapNik, which I provide with TileCache. http://trac.mapnik.org/wiki/XMLGettingStarted XMLGettingStarted- Tutorial ).

Now I want to change the output format to a paletted PNG with alpha

XML or in TileCache?

transparency using the 'PNG256'-parameter. The filesize of the 32bit PNG is a bit too big. Where do I have to define it? In the python script, in the

In TileCache; and the answer to "What should I change" is "You can't":

need to write a patch.")

TileCache doesn't have support for this at this time. (Or rather, "You'd

I tried this:

render_to_file(m, map_output,'png256')

and I added this:

m.save('test.png','png256')

to the python script, but no success.

will have an effect on TileCache...

It's note clear to me what Python script you're changing that you think

Is it also possible to switch the

formats.

renderer from AGG to CAIRO? I also want to experiment with the vector output

Not within TileCache...

Regards,
--
Christopher Schmidt
MetaCarta
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