Hi All,

I have come across a problem I cannot seem to get over.

I am rendering maps from openstreetmap.org. I have all the required software
installed on a CentOS 5.3 machine and everything's running fine. In one of
the files that does the rendering there is the command:

$convert  -colors 256 %s %s

which reduces the files size of a png file. When the auto-render script ran
it was leaving images (mainly images in the sea i.e. 100% blue images,
although some others had the same issue) with black vertical lines running
down it, just like a bar code.

I have extraced the line of code above and run it at shell :

$ convert  -colors 256 691.png 691.squish.png

This produced the same issue as before. (See attached)

Has anyone seen this error before, or does anyone have an idea how to
resolve it? It's rather annoying at the moment as all my map tiles are
either too large to host on a website (very slow loading times), or look
like an isle in your local shopping centre.

-- 
Regards,
Richard Ive.
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