Hi Not sure if this has already been done or thought of... probably While clicking over a very winding river today to digitize an old map I was thinking it would be really useful to combine some graphic package features found in gimp/photoshop. The idea being that as you click it would preferentially follow a certain line/colour. I could thus select a colour on the map and then just click a rough path over the river with the software recognizing my intention and adjusting the path the best fit the line based on the colour I chose or follow the line.
Regards -- Gerhardus Geldenhuis
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