Re-enable county borders
Multiple people have asked if it would be possible to add county borders to GeoSphere. I looked into it and we actually used to have the counties, but we made an optimization at one point to limit borders and basemap layers to 3 zoom levels. The furthest zoomed in level is not low enough to include counties.
Douglas Schumacher had an interesting idea of adding it as a separate toggle-able layer like the lon/lat grid lines. This wouldn't be too bad to add backend-wise. We should maybe consider this.