[Accessibility] SVG: embed proper Names as text

[Peter Wendorff]

Hi Jonathan.
Yes, it would be possible to include text as text in the SVG files.
Yes, the file would be partly searchable - you could search for a street 
name, that appears on the output.
But it's limited:
- Names, where the label is skipped in the output for geometric reasons 
would not be searchable anyway
- the structure of the image is not accessible even with the text.
- I don't see the benefit of that technique, as the image itself does 
not get accessible to a useful degree. Perhaps it would be possible to 
achieve that, but that would require a bigger change in the SVGs 
structure, which would again collide with the performance requirements 
for mapnik as a bitmap renderer.

But: If you have ideas or better patches for mapnik how to generate 
(more) accessible svg files, you are invited to write patches or discuss 
it with the mapnik developers.

Simply adding the label texts to the svg IMHO would not help. (If you 
think it would, please explain how it would be more accessible then)

regards
Peter

Am 05.11.2011 10:51, schrieb Jonathan Chetwynd:
> http://wiki.openstreetmap.org/wiki/Talk:OSM_XML
>
> I raised this issue in 2005 and afaict there has been no progress.
>
> openstreetmap provides data through for instance Mapnik in SVG format.
> Scalable Vector Graphics is a web technology and standard now well 
> supported in browsers.
>
> Current output is not searchable, see link for example.
>
> This has significant implications for accessibility, interoperability 
> and searchability.
>
> XSLT is another browser-native technology that may be used to 
> transform XML to for instance SVG,
> or might for instance be leveraged in the browser to provide a 
> gazetteer of place names.
>
> please advise who else might help openstreetmap incorporate place 
> names in SVG output dissemination.
>
> regards
>
> Jonathan Chetwynd
> http://www.peepo.com
>
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