On Nov 14, 2005, at 10:31, Jeroen Vanattenhoven wrote:
> What about GIS data? Currently there are a lot of GIS projects using
> SVG. I can imagine that GIS companies would like to protect their
> data.
>
Once again, hiding access to the code does not protect your GIS data.
GIS companies have a long experience protecting the data they ship,
notably using some form of watermarking (often by introducing small
errors in the output). It was always easy to steal GIS data by having
a few fast "small hands" reproduce it based on a printed map, using
SVG adds nothing new (and using a binary format won't help either,
for instance it's quite trivial to get data out of a SWF file).
However whichever the means you use, if you use it widely you'll get
caught by the watermarks, because they'll show no matter whether you
took the data by copying a printed map, munging an SVG document, or
running a vector tracing program on a GIF.
--
Robin Berjon
Senior Research Scientist
Expway, http://expway.com/
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