Vzdrževanje karte gozdnih sestojev v GGE Cerkno z lidarskimi posnetki

Makuc, Blaž (author), Hladnik, David (mentor)

V diplomskem delu smo prikazali uporabnost lidarskih posnetkov za delo gozdarskih delavcev na Zavodu za gozdove Slovenije. Za prikaz uporabnosti smo na območju GGE Cerkno izbrali 35 sestojev. Sestojem smo ocenili lesno zalogo z metodo hitre ocene temeljnice in jih prikazali na lidarskem in na ortofoto posnetku. Na podlagi obeh posnetkov smo preverili, kako zanesljivo so razmejeni sestoji. Hkrati smo primerjali tudi rezultate naše terenske analize s podatki sestojne karte Zavoda za gozdove Slovenije. Ugotovili smo, da so sestoji zelo dobro razmejeni, prihaja pa do napak v ocenah lesne zaloge, drevesne zmesi in celo razvojne faze. Razlika med našo oceno lesne zaloge in oceno iz podatkov ZGS je bila v samo enajstih sestojih manjša kot 10 %. V enajstih sestojih je razlika v ocenah znašala med 10 in 50 %, kar trinajst sestojev pa je imelo razliko v oceni lesne zaloge večjo kot 50 %, od tega devet sestojev celo preko 100 %. Pri ocenjevanju razvojnih faz in vrstne sestave so bile razlike manjše. Štirje sestoji so imeli po podatkih ZGS napačno ocenjeno razvojno fazo. Prav tako so imeli štirje sestoji po podatkih ZGS drugačno vrstno sestavo od naše ocene.

• Language: Slovenian
• Keywords: sestojna karta, lidarski posnetek, ortofoto posnetek
• Work type: Bachelor thesis/paper
• Organization: BF - Biotechnical Faculty
• Year: 2017
• PID: 20.500.12556/RUL-95729
• COBISS.SI-ID: 4872870
• Publication date in RUL: 21.09.2017

Secondary language

• Language: English
• Title: The maintenance of stand map in the forest management unit Cerkno with lidar data

Abstract

In this diploma thesis, we've tryed to show usability of lidar imaging for maintenance of the stand map. To assess the applicability of lidar, 35 stands were analyzed in the forest management unit Cerkno. First, we've evaluated the growing stock and tree height on the terrain for these stands, then we've made maps for each of the stands on lidar data and orthophoto images. On the base of both images the border of the stands was evaluated. At the same time we've compared our measurement data from the terrain with the ones in databases of the Slovenian forest service. We've found out that the forest is very well delimited to individual stands, but we've found inconsistencies in other parameters. The difference between our estimated growing stock and the one from the stand maps was lower than 10 % in eleven stands. The difference in eleven other stands was between 10 and 50 %. The difference in the thirteen remaining stands was more than 50 %. Nine of those thirteen had the difference of over 100 %. Evaluation of development phases gave us 4 stands which weren't in compliance with our estimations. Mixture of tree species was different in 4 stands.

• Keywords: stand map, lidar data, orthophoto map