Ok, that's a good step in the right direction. But since I stated that
I'm using mod_tile/renderd, how does one configure things to use that?
I see that mod_tile's renderd.py invokes mapnik.render(), but without
the 3rd argument which is the scale factor. Or is there a new version
of mod_tile that I need to pick up? Checking further reveals that
gen_tile..cpp invokes agg_renderer, but again without that optional 3rd
parameter of the scale factor.
I don't know which of these two modules is actually invoked by apache
when tiles are requested, but since neither one does scale_factor, this
looks like a mapnik feature that's not yet used by mod_tile/renderd?
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
On 5/31/2013 12:47 PM, Dane Springmeyer wrote:
Mapnik supports an optional `scale_factor` argument for rendering that
enables the 2x scale up (or any variable size) without any
modifications to your stylesheet.
See documentation at https://github.com/mapnik/mapnik/wiki/Scale-factor
Dane
On May 31, 2013, at 8:12 AM, Lynn W. Deffenbaugh (Mr)
<[email protected] <mailto:[email protected]>> wrote:
I'm running my own Tile Server (mod_tile/renderd created from
packages as described at
http://switch2osm.org/serving-tiles/building-a-tile-server-from-packages/
and would like to serve up a new set of tiles with larger font sizes
for higher resolution displays.
I read
https://help.openstreetmap.org/questions/8467/font-size-and-adding-scale-to-map
which describes the textsymbolizer element in osm.xml, to whit:
<https://help.openstreetmap.org/vote/8472/up/>
3
<https://help.openstreetmap.org/vote/8472/down/>
The font size comes from the style file /osm.xml/. This includes
several lines on the form "/|<textsymbolizer name="name"
fontset_name="bold-fonts" size="11"/>|/". You can edit the /size/
parameter in the wanted areas to generate a new style with other
font sizes.
But there's a TON of textsymbolizer's that would need to be edited.
Cloudmade's tile servers support an embedded doubler in their tile
URL as described at
http://developers.cloudmade.com/projects/tiles/documents
To get double resolution tiles use *@2x* suffix: 997@2x - this will
improve map look for iPhone 4, Motorola Milestone, etc.
Does anyone know how they do that? Is there a way to replace the
textsymbolizer element size attributes with a variable (say Size11,
Size8, SizeN) so that I can simply clone the style and edit all of
the sizes in a single place? Then I could do a 1.5, 2, 4, or
whatever by simply editing the sizes where the variables are declared
instead of every single textsymbolizer element.
Any/all help would be appreciated to accomplish label font scaling in
the rendering chain with minimal manual editing work for each scale
that I support.
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
_______________________________________________
dev mailing list
[email protected] <mailto:[email protected]>
http://lists.openstreetmap.org/listinfo/dev
_______________________________________________
dev mailing list
[email protected]
http://lists.openstreetmap.org/listinfo/dev
