Data and controls are pretty simple and fully described in a specification document (in English, here attached), which describes the behavior of the whole webapp.
Data will be stored in a server database, therefore it must be dynamically loaded according to navigation (Ajax calls, in a Google Maps manner).
This mission does not include design, you can use a prototype design of your choice, but appearance logic must be separated in the code in order to be easy to modify and extend.
We are web developpers and already worked on a prototype, so functional specifications are detailed and written on the document. If there are more functional and technical questions, we will be glad to answer them.