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Image of forested area near a suburbian street

Urban Forestry

Discover the Trees of The Forest City ...
Did you know that more than 120 species of trees grow on City-owned property in the Forest City? Use CityMap to interactively explore the inventory of trees in parks, on Thames Valley Golf Course and along boulevards and pathways on City land fronting homes and businesses.

Once you've created your desired map view using the CityMap service and found an address or park, use the blue "I want to ..." button to add the tree layer to the map. More instructions on using the CityMap can be found here.  Trees in the inventory are represented by green dots and you will be able to view the the following information for any tree in the inventory listing.  Trees have been located on the map as accurately as the technology allows.

  • Common name
  • Latin (scientific) name
  • Trunk diameter (cm)
  • Year observed
  • Inventory number (you may want to cross-reference this number if you are contacting the City of London's Forestry Operations Division about a concern or problem with a tree on municipal land)

Trees provide countless benefits to our community beyond their aesthetic appeal. For example, through their moderation of the local climate alone trees can save up to 10% of energy consumption.
Like other elements of the City's infrastructure systems (roads, sidewalks, sewer/water pipes and so on) trees require ongoing care and maintenance. Supporting and improving the urban tree canopy delivers a wide range of economic, ecological and social benefits to the community. As "living filters" trees play an essential role in removing pollution from the air we breath and the water we drink. They also provide organic material to fertilize soil, serve as a source of food and shelter for wildlife, reduce soil erosion and storm water runoff and beautify our homes with comforting shade in summer and shelter from winter winds.

A tree can grow to manufacture five pounds of pure oxygen per day, consume carbon dioxide to fight the "greenhouse effect" and provide the cooling equivalent of ten room-size air conditioning units.

Please see our August 11, 2008 media release for information on two new initiatives that will help Londoners help trees.

About the inventory

The City of London tree inventory was undertaken in the summer of 2002 and is regularly updated to reflect spring and fall tree planting programs as well as the removal of dead or hazardous trees. The data assists the City's Forestry Group in managing its year-round maintenance program as well as planning what tree species to plant and where.

Trunks are measured at the standard diameter height of 1.4 meters (4.5 feet) above the ground. Leaning trees, multi-stemmed trees and other abnormal conditions are measured using professional appraisal techniques.

For London residents a practical use of the trunk measurement is being able to assess tree root impacts for any planned construction. Every effort should be made to stay 30 cm away from the trunk for each 3 cm of trunk diameter.

Forest City tree inventory facts as of September 1, 2002 include the following:

  • Number of street trees on city property 123,359
  • Number of trees in managed park areas 32,101 - does not include unmanaged "natural" areas such as Meadowlily Woods, Medway Forest and along the banks of the Thames River.

Of the top 10 trees, five are maples (Norway Maple, Silver Maple, Sugar Maple, Norway Schwedler Maple and Manitoba Maple) and represent 33% of the total tree population in the City of London's inventory.

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