Table 2 Comparison of standard measurement methods of domestic and foreign landscape trees

Division Landscape tree standard measurement methods
Tree height Trunk height Trunk size
Korea Surface - Vertical distance to the top of the tree

Vertical height of stem : Palm tree

Clear-bole length : Roadside tree

Diameter at breast height: Diameter of the stem at a height of 1.2m from the ground surface.

Diameter at root collar: Diameter of the stem in contact with the ground surface.
Japan Top of the root ball - Vertical height to the top of the crown Vertical height of stem: Palm tree

Stem circumference: 1.2m stem circumference length from the ground surface.

Root collar circumference: The circumference of the upper stem of the root.
America From the surface to the top Trunk height: Palm tree types clear-bole length: Roadside tree

After measuring the diameter (d) at a height of 15cm from the ground surface.

10cm or less in diameter : Measured at 15cm above the ground surface.

10cm or more in diameter: Measure 30cm of the ground surface.

Trees large enough to be transplanted: Measures 1.37m above the ground surface.
Canada Total height Head height Stam height

Diameter (d) is less than 4cm~10cm: Measured at a height of 15cm from the ground surface.

10cm or more in diameter: Measured at a height of 30cm from the ground surface.
England Overall height Clear stem height

Circumference length: The circumference of the stem at 1m above the ground surface.

Korea: Ministry of Land, Infrastructure and Transport Standard Specification for Landscape Construction(2016)

Japan: 公共用綠化樹木の品質寸法規格基準(案) 第5次 改訂, 国土交通省　国都緑環　第47号(2008).

America: http://www.nurserycropscience.info/cultural-practices/pruning/other-references/american-nursery-landscape-assoc-standards-2004.pdf/view(2004)

Canada: https://www.drevo-spas.ru/userfiles/Canadian_Standards_For_Nursery_Stock _-_8th_Edition_2006.pdf(2006)

England: British Standards Institution/BS 3936-1:1992 Nursery stock. Specification for trees and shrubs(1992).