A sample post with this front matter:

---
layout: post
title: Sample Post 2
location:
    geojson: '{
        "type": "Feature",
        "properties": {"popupContent": "Yellowstone National Park",
                       "href": "/samples/sample-post-2/},
        "geometry": {
            "type": "Point",
            "coordinates":
                [-110.723183, 44.412266]
        }
    }'
permalink: /samples/sample-post-2/
---