An organization has regions within a province, but has no list of coordinates that define region boundaries. I would like to draw custom polygon areas on a map using a web-based and user-friendly interface (such as Google My Maps or Scribble Maps). The regions are for data aggregation.
What open-source tool would you use to define the coordinates by drawing polygons on an interactive map? That is:
Browser -> Map -> Polygons (shared boundaries) -> Export
If the export step (to PostGIS) was performed automatically, so much the better.
A cross-browser solution (IE8, FF, Chrome, Safari) with a working demo would be most helpful.