title: How to read a geojson file containing feature collections to leaflet-shiny directly
body: <p>My question is how to read a geojson file containing feature collections to leaflet-shiny. I have seen joe's github <a href="https://github.com/jcheng5/leaflet-shiny/blob/master/inst/examples/geojson/server.R" rel="nofollow">https://github.com/jcheng5/leaflet-shiny/blob/master/inst/examples/geojson/server.R</a> but he did not use an external dataset but created the geojson manually. i am confused whether</p>
  
  <ol>
  <li>Is that possible to read geojson file to leaflet-shiny directly?</li>
  <li>If not, what does the structure of feature collections look like in shiny (in Joe's post it is multi-polygon) and how to create that in a faster and easier way?</li>
  </ol>