> I’m similarly curious to hear if other people have done annotation with zoomable interfaces before. I have been trying OpenLayers' stock functions for this kind of thing for OurDigitalWorld, there is an example here [1]. Leaflet probably does this well too. The mapping tools do seem to have some slick drawing functions [2] though I have only used polygons. art --- 1. http://tiles.uwindsor.ca/ink/cecil/focus/swoda/pictures/assumption/09_1915/00001 2. http://openlayers.org/dev/examples/draw-feature.html