Fig. 2From: Single-image photogrammetry for deriving tree architectural traits in mature forest stands: a comparison with terrestrial laser scanningVisual representation of a particular branch angle (BASIP) measurement with SIP method; BT is the thickness of the branch measured at the distance of 0.5Â m from the branch insertion point; the software used for measurements was QGIS v.2.8.7 (QGIS Development Team 2016)Back to article page