Mapping Trees in Toronto

As cities go, Toronto is often ranked as one of the greener ones.

The city has a database of trees that reside mostly on public land and consists of more than 560,000 trees and 246 species. I used Shiny and Leaflet-R to visualize the distribution of different species across the city. You can see it here.

The drop down allows you to select tree species by common name or Latin name. If you backspace you can enter a search term. For example, typing “maple”" shows the 39 variety of maples in the city.

Each blue circle is a tree. Darker circles represent multiple trees at the same location. If you zoom in close, named streets appear.

Clicking on any blue circle reveals more information about that specific tree including: address, coordinates, diameter 1.3m above the ground, and the tree family that this species belongs to.

Here are a few species that had interesting, non-uniform distributions.

  • American Mountainash
  • Superform Norway Maple
  • Weeping White Mulberry
  • Yew

I was curious about which tree had the greatest variety of other tree species within a 10m radius. After chugging away for a while my Mac revealed the answer to be in the NE corner of High Park which is shown with a red circle on the map.

Unfortunately the data isn’t perfect as 502 trees had these exact same lat/long coordinates. Still, here are the 47 different species that likely reside in close proximity.

  • Amur Cork
  • Apple
  • Ash
  • Austrian Pine
  • Black Cherry

  • Black Maple
  • Black Oak
  • Black Willow
  • Bur Oak
  • Callery Pear ‘Chanticleer’

  • Carolina Poplar
  • Colorado Blue Spruce
  • Columnar Norway Maple
  • Crab Apple
  • Eastern Hemlock

  • European Beech
  • Ginkgo
  • Hack-Berry
  • Honey Locust
  • Kentucky-Coffee Tree
  • Linden
  • Manitoba Maple
  • Maple
  • Mulberry
  • Norway Maple

  • Oak
  • Red (Green) Ash
  • Red Maple
  • Red Oak
  • Sassafras

  • Scotch Elm
  • Scots Pine
  • Service-Berry
  • Siberian Elm
  • Silver Maple

  • Silver Queen Silver Maple
  • Silver White Poplar
  • Skyline Honey Locust
  • Sugar Maple
  • Tulip-Tree
  • Walnut
  • Weeping Willow
  • White Ash
  • White Oak
  • White Pine
  • Willow
  • Yew