new_contents: #http://www.openstreetmap.org/node/1230069003
  assert_has_feature(
      15, 5285, 12654, 'pois',
      { 'kind': 'communications_tower', 'min_zoom': 15 })
  
  #http://www.openstreetmap.org/node/747693102
  # ideally the landuse would show up at zoom 13, but that's sparse coverage
  # most features are buildings, some of which are incorrectly tagged (should be telescope)
  assert_has_feature(
      15, 9504, 12490, 'pois',
      { 'kind': 'observatory', 'min_zoom': 15 })
  
  #http://www.openstreetmap.org/node/258205070
  assert_has_feature(
      16, 10623, 25430, 'pois',
      { 'kind': 'telescope', 'min_zoom': 16 })
  
  #http://www.openstreetmap.org/way/258205070
  # If someone took the time to digitize a building, promote it up
  assert_has_feature(
      15, 5324, 12781, 'pois',
      { 'kind': 'telescope', 'min_zoom': 15 })
  
  #http://www.openstreetmap.org/node/2622856034
  assert_has_feature(
      13, 1409, 3281, 'pois',
      { 'kind': 'offshore_platform', 'min_zoom': 13 })
  
  #http://www.openstreetmap.org/way/346405529
  assert_has_feature(
      13, 1367, 3261, 'pois',
      { 'kind': 'offshore_platform', 'min_zoom': 13 })
  
  #http://www.openstreetmap.org/way/350328482
  assert_has_feature(
      13, 1942, 3395, 'pois',
      { 'kind': 'offshore_platform', 'min_zoom': 13 })
  
  #http://www.openstreetmap.org/node/1501843094
  assert_has_feature(
      15, 5240, 12673, 'pois',
      { 'kind': 'water_tower', 'min_zoom': 15 })
  
  #http://www.openstreetmap.org/node/1501843094
  # This isn't part of the work, but because we split water_tower 
  # off from mast, we should test mast still shows up
  assert_has_feature(
      16, 10588, 25442, 'pois',
      { 'kind': 'mast', 'min_zoom': 17 })
subject: add man_made outdoor landmarks