Ten downtown contexts
Click a row to pick it out on the map; the rest fade back. Ctrl- or Shift-click to add more rows. Click the only picked row again to see everything.
Zoomed out, districts are circles. Circle area is the district's street-level activity: 1 per storefront building, ½ per civic building (town hall, house of worship) and 1 per 15 service jobs. Past zoom 12 the circles give way to each district's outline.