Are there any open source web based solutions that allow you to upload an image, georeference it to a baselayer, then draw and export geojson feature data?

Possibly similar to http://geojson.io . But includes the ability to upload images and match them up to a baselayer. And then digitize the features with a drawing tool.

Seems would be possible to create with Leaflet plugins like Leaflet.DistortableImage

Wondering if someone has already created something similar?

closed as too broad by PolyGeo Apr 4 '17 at 19:54

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MapWarper will do the first part of what you want.

It's a free to use, open source map warper / map georectifier, and image georeferencer tool. Developed, hosted and maintained by Tim Waters. This project is supported by Topomancy LLC and the New York Public Library.

Once you have a referenced layer then adding some leaflet code to allow you to draw on it and save as GeoJSON is left as a (trivial) exercise for the reader.

  • Thanks, MapWarper looks really great and open source. However, I'm unfortunately not well versed in Ruby/Rails in which its written, to be able to add the drawing tool onto it. I think would be great to have just one website tool to do both parts. – seablue Apr 4 '17 at 19:31
  • I just realized that geojson.io is open source and written in JS and mapbox/leaflet. So if can't find an existing all-in-one tool, I might play around with that to try to add the ability to upload a image layer to digitize from, using the mentioned leaflet distortableimage plugin. – seablue Apr 4 '17 at 19:42

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