You might be interested in what they are building at http://felt.com/ http://felt.com/ they have a lot of great data sets already built in and it can handle imp

You might be interested in what they are building at http://felt.com/ http://felt.com/ they have a lot of great data sets already built in and it can handle imports of all kinds of mapping data. Not for actually updating the core data of maps, but seems like the tool to address the UX of mapping multiple types of data and presenting or exploring it.