I was contact via the mail, after the suggestion received from this https://help.openstreetmap.org/questions/37163/is-there-anyone-who-could-provide-a-umap-introduction-in-english-for-beginners-on-310
And i am now having a email conversation with Tom from shareable
What i see , at least for the input of the data, as others are saying, is to use JOSM editor and to add the data directly into OpenStreetMap
In osm you have almost all the tags needed, and if a tag is missing, it can be created.
From what i see and the maps that where made last year, over 70 % of the tags can be found in a way or another in osm
2 examples :
Also, each amenity can show if is accessible to persons in wheelchair http://wheelmap.org/en/ if the users put the necessary tag, and also the opening_hours tag can be parsed and show on the map
This is a proprietary map but a open source solution can be made, there are different github projects that you can find
More information can be found on the wiki page http://wiki.openstreetmap.org/wiki/Key:opening_hours
Also, to create a wiki page designed specific for the majority of tag`s that will be needed to be entered, and maybe a quick tutorial or some sets of data.
All of the resources can be put into a linux running virtual machine, so that the users will have everything setup, JOSM with all the plugins, what ever else would be needed.
You can create a style special made to highlight just the details that you want
They will just have to install Virtual Box and download the image file, and the setup will be the same for everybody. You can also pre-install it with Teamviewer , or another software that will allow for quick troubleshooting , and also you will be able to pre-configure a lot of things.
The same approach that the guys at OS-Geo Live are doing http://live.osgeo.org/en/index.html
Everything that is added related to the mapjam to have a tag, per example
Or something similar, in this way you can take a tool that shows the modification in real-time on openstreetmap, but show only the tags that have mapjam=2014
Like this github example :
And in this way you can have a real time, and also record the screen and have it as a video
As for uMap, i was not able to find a way to export the data, and created this bug request
And also a more simplified way of showing and changing the symbol of the icon https://bitbucket.org/yohanboniface/umap/issue/125/custom-icon
One lost thing, if you want, for the marketplace, you can even provide a real time "google" street view with mapillary, that allows anybody with a cell phone to capture a place.
So in a community garden or a marketplace, instead of only showing a picture, you can have the people virtually walking into the place, exploring it
Have a good day,