Use the Path Tool (and don't forget to open the Paths dialog to be 
able to deal weith it properly).
Pinpoint your needed coordinates as nodes of a path, and them save 
that path to disk.

It will be in SVG format (for gimp>=2.0 ) , but the coordinates can be 
read inside there.


On Wednesday 13 October 2004 11:24, Yajie Sun wrote:
> Hi, All,
> I just started to use GIMP to trace the boundary  of some objects
> on an image. I have used the (transparent) layer to (hand) draw the
> boundary so that I can save the traced boundary only.
> I do have a question. I do not know how to save the traced boundary
> in a text file with the coordinate only: (row, col) or (x,y). Could
> someone help me? It is urgent.
> I think the one of the inputs to pencil or airbrush is an array of
> the coordinates when hand-drawing: (s.x1, s.y1), (s.x2, s.y2)....
> Does anyone know how to save the coordinates only?
> Thank you so much for your help.
> Sincerely,
> Joshua
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