Key:circumference

The circumference key is used to describe the circumference of a tree's trunk at the height of 1.3 metre above ground. Used together with natural=tree.

Example

Average human compared to trunks of various circumferences. Ordered from the smallest to the biggest, the values (in metres) are: 0.1, 0.5, 1, 3, 5, 10, 15, 20, 30, 40 and 50.

• circumference=2.3 to describe a trunk with a circumference of 2.3 metres
• If your DBH is 95 (by default cm) they you will need to divide by 100 and multiply by 3.14159 and choose the first two significant figures and round the 3rd. This results in 2.98 metres.

See also

• OSM2World uses this tag to render trees and tree rows.
• Straßenraumkarte Neukölln uses this tag to render trees and natural=tree_stump.
• Osmose has a quality check that flags trees with a trunk circumference greater than 45 m (the current world record is 43).