Rapid feedback output products

[brian-r-calder]

Dr Mathias Jonas (Secretary General, IHO) suggested:

It would be really useful to have a rapid feedback mechanism for data collectors as to what they have contributed. This needs to be something simple!

So:

1. Provide some mechanism to take GeoJSON files and make some output artefact (e.g., PDF, GeoTIFF) that can be given to data volunteers.
2. Make a tool to allow this to be done smoothly over multiple files for the same collector, or multiple collectors.
3. Batch mode for the tool to make sure that this can be scripted.
4. Minimise effort on the part of the data collector in using the output artefact.