1. zonebuilder::london_area
    Region representing London in projected coordinate system
    csv| json| rda| rds
    sfc_POLYGON
  2. zonebuilder::london_area_lonlat
    Region representing London in projected coordinate system
    csv| json| rda| rds
    sfc_POLYGON
  3. zonebuilder::london_cent
    Region representing London in projected coordinate system
    csv| json| rda| rds
    sfc_POINT
  4. zonebuilder::london_cent_lonlat
    Region representing London in projected coordinate system
    csv| json| rda| rds
    sfc_POINT
  5. zonebuilder::zb_100_triangular_numbers
    The first 100 triangular numbers
    json| rda| rds
    integer