[Tilesathome] Lowzoom rendering

[Jeremy Adams]

Just to make sure I'm doing this correctly:

If I want to render a lowzoom tile (say 74,95) I first render a lowzoom caption-only using the layers.conf you provided below.  I would run perl tilesGen.pl xy 74 95 8.  Then upload and wait for processing.

After the t at h server has processed the tile I then run perl lowzoom_composite.pl 74 95 8 12 captionless caption.  After it does it's thing, I have the tiles and they appear to be rendered OK.  I'm not sure how to get them uploaded though.  I dumped them in the temp dir and tried using tilesGen.pl to upload them, but it only grabbed the caption tiles and left the captionless behind.  Is there a different method for uploading these?

-Jeremy

  ----- Original Message ----- 
  From: 80n 
  To: Jocelyn Jaubert 
  Cc: tilesathome at openstreetmap.org 
  Sent: Saturday, February 23, 2008 6:35 AM
  Subject: Re: [Tilesathome] Lowzoom rendering


  The new lowzoom method uses a different process.  

  The first step is to generate a lowzoom caption-only layer for z8-z11.  There's no layers.conf in svn that will do this at the moment, but the one I use is included below.

  You then have to upload this layer and wait until it has be processed by the t at h server.  Currently the next step expects to be able to download the caption layer, and you don't get up-to-date results unless its there.

  The second step is to run the tools/lowzoom/lowzoom_composite.pl script using the following arguments:

  lowzoom_composite.pl x y 8 12 tile captionless caption

  This will read the z12 captionless base layer and the caption layer from z8 to z11 and composite these together to create the tile layer which is what ultimately gets uploaded.

  This approach currently works best for z8 - z11, there is a projection bug which causes captions to be misplaced at levels lower than z8, so usual tilestitching method is still the best approach for z0 - z7.

  There's a summary of the approach here: http://wiki.openstreetmap.org/index.php/Tiles%40home#How_the_client_works

  80n

  My layers.conf for z8-z11:

  # Layer configuration for tiles at home
  # ==================================
  #
  Layers=lowzoom
  LayersCapability=lowzoom


  Layer.lowzoom.MaxZoom=11
  Layer.lowzoom.Rules.8=osmarender/caption-z8.xml
  Layer.lowzoom.Rules.9=osmarender/caption-z9.xml
  Layer.lowzoom.Rules.10=osmarender/caption-z10.xml
  Layer.lowzoom.Rules.11=osmarender/caption-z11.xml

  Layer.lowzoom.Prefix=caption
  Layer.lowzoom.Preprocessor=
  Layer.lowzoom.RenderFullTileset=1

  Layer.lowzoom.Transparent=1




  On Sat, Feb 23, 2008 at 10:40 AM, Jocelyn Jaubert <jocelyn.jaubert at gmail.com> wrote:

    Hi,

    I'm doing some lowzoom rendering by running:
    ./tilesGen.pl xy 133 93 8

    But the tile I generate are completely different than the other ones.
    In fact, it seems that I don't have the code to simplify the amount of
    printed town names.

    My client is up to date (revision 6954).

    Did I forgot something ?

    Thanks,
    Jocelyn

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