title: Mapbox GL Vector tiles + dynamic properties
body: <p>I have a mapping application that uses Mapbox.com to serve vector tiles of uk postcode boundaries. The boundary files are large and are not suited for download using something like TopoJSON. This works beautifully.</p>
  
  <p>I am also using data driven styles to format the look and feel of the map. I now want to display user specific data ontop of the shared boundary data. From what I can tell, I will need to serve up individual vector tiles generated from the users data rather than project their data onto the existing tile-fetched vector data. I can't create a unique vector tile set in Mapbox for all the users.</p>
  
  <p>It seems a waste of bandwidth re-fetching the geometric information when only the properties has changed, is it possible to somehow 'project' a session specific set of properties onto the fetched data?</p>