From: "Pete Skirrow" <******@*******.co.uk>
To: <*******@********.co.uk>
Cc: <Jim_Henderson@SIL.org>
Subject:  Lindos4.svg at Wikipedia
Date: Tuesday, 27 January 2009 21:57

Hello Jim

I made the original images you mention, as well as some others for:

 http://en.wikipedia.org/wiki/Weighting_filter
http://en.wikipedia.org/wiki/Weighting 
http://en.wikipedia.org/wiki/Robinson-Dadson_curves 
http://en.wikipedia.org/wiki/Programme_levels 
http://en.wikipedia.org/wiki/ITU-R_468_noise_weighting 
http://en.wikipedia.org/wiki/Rumble_(audio)http://en.wikipedia.org/wiki/A-weighting

I can tell you that they all came up perfectly for years, but became 
corrupted a few months ago. This suggests to me that the problem lies in the 
.svg to .png translator that is applied to all Wikipedia page images, so 
that they appear on the page as .png which is a bitmapped opensource 
equivalent of a GIF file. This is done because, although many modern 
browsers can display .svg files directly, it cannot be assumed that all will 
do so.  I think someone updated the Wikipedia conversion software, and that 
it is now incompatible with .svg files generated in OpenOffice.  If you look 
at the last page listed above you will see that this graph is not corrupted, 
and I think this is because this one was created after I discovered and 
started using the free software Inkscape, which I now use and recommend to 
make drawings.

If you double-click on any of the images that is corrupted, to bring up it's 
file page, and double-click on  the .svg file link, you will see that it 
comes up perfectly. If you right-click and select 'save target as' you can 
save the .svg file and then use it as you wish. Inkscape will allow you to 
convert it to .png or I think .gif.

I do not know how to solve the problem on the actual Wikipedia pages, and am 
surprised that someone has not solved the conversion incompatibility by now. 
One way is to re-create all the .svg files in Inkscape and upload them, but 
I am not sure whether this means redrawing them from scratch.  I intend to 
look into this. Another way would be to simply upload .png images to 
Wikipedia, but this would be a great shame because of course .svg images, 
being vector graphics, have no resolution limit, and can be used to generate 
perfect bitmapped images of any size whatsoever.

Hope this helps,

Pete Skirrow

----- Original Message ----- 
From: "Chris Skirrow" 
To: "Pete Skirrow" 
Sent: Tuesday, January 27, 2009 11:09 AM
Subject: FW: Technical people: Lindos4.svg at Wikipedia


>
>
> -----Original Message-----
> From: Jim Henderson [mailto:Jim_Henderson@SIL.org]
> Sent: 27 January 2009 06:24
> To: info@lindos.co.uk
> Subject: Technical people: Lindos4.svg at Wikipedia
>
>
> Hello,
>
> I'm so glad you provided images for the Wikipedia articles on
>    Fletcher–Munson curves
>        http://en.wikipedia.org/wiki/Fletcher–Munson_curves
> and
>    Equal-loudness contour
>        http://en.wikipedia.org/wiki/Equal-loudness_contours
>
> The image for the Equal-loudness contour page (Lindos1.svg) is very 
> helpful,
> but the image for the Fletcher-Munson curves page (Lindos4.svg) has been
> produced in such a way that the text labelling the left axis is jumbled.
>
> I downloaded the jumbled image from the link on the page
>    http://en.wikipedia.org/wiki/File:Lindos4.svg
> and looked inside with my XML editor, but I didn't know how to change it 
> to
> stop the text being jumbled.
>
> Do you know how to fix this SVG file, or how to reconvert the original 
> image
> without the text getting jumbled?
>
> Thanks for listening,
>    Jim
>
>