Sharper Shape Oy

Geodeettinen Laitos

Blom Kartta Oy

Diware Oy

Juha Hyyppa

Tero Heinonen

Pekka Savolainen

Heikki Luukkonen

Eija Honkavaara

Xiaowei Yu

Anttoni Jaakkola

Antero Kukko

Disclosed is a system for monitoring a power line. The system includes a ground unit and one or more airborne measurement devices for measuring distances between the power line and objects spatially located in proximities of the power line. Each of the one or more airborne measurement devices includes a computing hardware, one or more cameras for capturing images and a data memory for storing pattern-recognition software. The pattern-recognition software is executed on the computing hardware to process the images to identify a unique identifier attached to the ground unit. Each of the one or more airborne measurement devices maintains a line-of-sight with the ground unit during flight by tracking with computer vision the unique identifier attached to the ground unit.

System for monitoring power lines

The method is for forest inventory and for determination of stand attributes. Stand information of trees, sample plots, stands and larger forest areas can be determined by measuring or deriving the most important attributes for individual trees. The method uses a laser scanner and overlapping images. A densification of the laser point clouds is performed and the achieved denser point clouds are used to identify individual trees and groups of trees. A computer program is used for performing the method.

Method for determination of stand attributes and a computer program for performing the method

The invention relates to a method for the determination of stand attributes with an instrument above the stand. In the method, three-dimensional information is collected from the stands by using such a number of sample hits, that individual trees or groups of trees can be distinguished. A three-dimensional tree height model is produced from collected information. Stand attributes&mdash;which are characteristics of individual trees or groups of trees and/or characteristics derived using these information for larger areas&mdash;are determined from the tree height model. The invention also relates to a computer program which can be used to carry out the second and third step of the method.

Method for determination of stand attributes and a computer program to perform the method

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Espoo, Finland

Juha Hyyppa