Its possible with Google Map API to draw geometries and points. And exporting as well I assume. Is there other alternatives, probably based on Java that can do the same job? I've been researching on this, but without luck. I've read about geotools, wmts-service and more, but nothing close. Another solution could be a light version of QGIS as web interface with limited functions, but that's a major project to build.
closed as too broad by PolyGeo♦ Apr 21 '16 at 4:44
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There is a Leaflet plugin called Leaflet Draw
You would have to write some code to export the drawing to a data file, ie. GeoJSON, that the user would download...