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New Zealand Plant Protection 68 (2015): 439

LIDAR comparison for the use of orchard characterisation

T. Leseur, M. Hagedorn and R.L. Roten

ABSTRACT

LIDAR (Light Detection and Ranging) is a remote sensing technology that measures distance by illuminating a target with a laser and analysing the reflected light. LIDAR is largely used in geography, geology, forestry and other sectors. In agriculture LIDAR is used for creating topographic maps of fields and for crop mapping in orchards and vineyards. The objective of this study was to test two LIDAR systems for their ability to obtain useful canopy characteristics within an apple orchard. The two LIDAR systems included a SICK LMS200-30106 and a SICK LMS511-10100 PRO SR, which mainly differ by the laser beam divergence, the number of signal returns, the range, and the resolution as well as frequency values. Methods involved mounting each LIDAR side-by-side in conjunction with a RTK GPS and computer system. One orchard line was scanned on both sides in order to obtain a full scan at three differing ground levels: 60 cm, 115 cm and 120 cm. As expected, the captured data indicate differing resolutions and further analysis is being administered to determine canopy characteristics between the two LIDAR models, such as percent open space and porosity. This technology could be used for improving agrichemical application in orchards.

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