[OSM-talk] Static osmarender tile generation

Nick Burch openstreetmap at gagravarr.org
Mon Oct 16 12:15:18 BST 2006


On Mon, 16 Oct 2006, Mikel Maron wrote:
> So there are some bits and pieces of code from this could be useful 
> addtions.

Glad it's of use :)

> The very large images were also a problem. Haven't implemented it yet, 
> but the solution I think is to use VIPS 
> (http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS) which provides 
> random access into image files, so the whole huge image won't be loaded 
> into RAM.

I've just given VIPS a whirl, and it is able to nicely crop out tiles from 
the really large PNG.

There are rpms of VIPS available from dag, and it's in debian 
(libvips-tools). Are people who are thinking of using the static image 
generation happy with installing it?


(ImageMagick 6.2.5 on FC5 seems not to have the cropping bug, but all the 
versions in debian do have it, and ImageMagick does seem to be much more 
resource intensive than VIPS)

Nick




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