[Tilecache] Caching a raster saved on the local disk

[Christopher Schmidt]

On Tue, May 06, 2008 at 10:18:42AM +0200, Simone Gadenz wrote:
> Following the current post I tried to cache a local image using the image
> layer. I had exactly the same problem showed in this post at the beginning
> of this year:
> http://openlayers.org/pipermail/tilecache/2008-January/000686.html.
> 
> Doing some investigation it turned out that the line that fails is the 
> 
> self.image = Image.open(self.file)
> 
> into the Image.py file.

TC 2.01 is broken; use SVN. (I'll push out a new release sometime later
this week.)

> I am not a pyton programmer at all, I did a simple test that was to run the
> followung code into a single file and then to include the same code into the
> Image.py. 
> 
> import sys
> import Image
> 
> for infile in sys.argv[1:]:
>     try:
>         im = Image.open(infile)
>         print infile, im.format, "%dx%d" % im.size, im.mode
>     except IOError:
>         pass
> 
> 
> It worked as single file but it failed into the Image.py
> What I find really strange is that also the other layers defined in the
> config file that were working before the introduction of the new imagelayer
> definition stopped working.
> The error is not demepnding on the layer called and it is:
> 
> 
> C:\Inetpub\wwwroot\ts\TileCache>tilecache_seed.py
> "http://139.191.1.147/ts/tile
> ache/tilecache.cgi?" simone 0 6
> C:/MapData/TestLargeRaster/prova.jpg
> Traceback (most recent call last):
>   File "C:\Inetpub\wwwroot\ts\TileCache\tilecache_seed.py", line 9, in
> <module>
>     TileCache.Client.main()
>   File "C:\Inetpub\wwwroot\ts\TileCache\TileCache\Client.py", line 96, in
> main
>     layer = svc.layers[sys.argv[2]]
> KeyError: 'simone'
> 
> 
> Ideas?
> 
> 
> Simone
> 
> 
> -----Original Message-----
> From: fredrik.lundh at gmail.com [mailto:fredrik.lundh at gmail.com] On Behalf Of
> Fredrik Lundh
> Sent: lunedì 5 maggio 2008 14.18
> To: Simone Gadenz
> Subject: Re: [Tilecache] Caching a raster saved on the local disk
> 
> > is it possible to create a cache structure for an image stored on the
> local
> > disk? In case what would be the best strategy to integrate this
> > functionalities into the existing scripts? Would be possible to reuse
> > functions for cutting metatiles?
> 
> sounds like the ImageLayer handler is what you want; see the first two
> configurations on this page for examples:
> 
> http://svn.tilecache.org/tags/tilecache/release-2.01/docs/EXAMPLES.txt
> 
> </F>
> 
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-- 
Christopher Schmidt
MetaCarta