3

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

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

2

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

Not the answer you're looking for? Browse other questions tagged or ask your own question.