Estimation of stem attributes using a combination of terrestrial and airborne laser scanning

• A new method to combine terrestrial laser scanning (TLS) with airborne laser scanning (ALS) has been evaluated for estimation of stem diameters (DBH) and stem volume at single tree level. The aim is to measure tree stems in field plots with TLS to use as training data for wall-to-wall estimation of forest variables based on ALS data. DBH and tree positions were estimated from TLS data in six field plots. Trees estimated from TLS data and tree heights and positions estimated from ALS data were co-registered to automatically link TLS and ALS measured trees. DBH estimated from TLS data and tree height measured in field for a sub-sample of trees were used to train regression models based on ALS derived tree crown segments. At tree level, the root mean square error (RMSE) was 46.6 mm (15.6%) for DBH, 9.8 dm (3.8%) for tree height, and 200.6 dm3 (34.4%) for stem volume

Ämnesord

LANTBRUKSVETENSKAPER  -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)

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