Missions
Missions near you: up to five trees a few minutes’ walk from you that ALTO most needs a photo of. Your location stays on your phone.
Species maxima: measure the girth
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Girth is taken with a tape around the trunk at 1.4 m above the ground (on a slope, from mid-slope), in centimetres. The girth form shows what to do at a fork or with several stems. Public land only: do not climb, enter private property or fenced areas, or stand in the road.
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Field missions
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