[Geotools-devel] export format for freehand map decorations

[andrea a. <and...@gm...>]

Hi, I find myself in the position to have to decide on how to export
freehand drawn annotations from udig.
Since I am no master of the formats-universe, I wanted to know if
anyone knows what I should best use.
I think this is the right list to ask for, please correct me if you
find the word udig appears too often.

To explain:
I have a plugin that draws freehand on a udig map layer. I have the
possibility to change strokewidth and color/transparency.
This gives me the possibility to really paint different strokes with
different colors and to simulate fills by drawing.
The drawing is saved into a H2 embedded database (not yet spatially
though) and is CRS aware and is reprojected if needed.
Also it is scale aware, keeps the width fixed for the scale at which
it was drawn and scales with the zoom.

Now I have the problem to understand what to do it the user says "export layer".
My first thought was svg, since it is a drawing. But then how to
overlay it again over a map?
Shapefile doesn't seem to be a feasible choice.

A friend told me that GML could be a nice choice.
Since I don't know tooo much about it, I wanted to ask for
comments/advices to the list.

Thanks,
Andrea