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1
Content available remote Eksperyment w obrębie Zajma
PL
Lotniczy skaning laserwoy w urządzaniu lasu. Podczas klasycznych prac urządzania lasu, wykonywanych w ramach kolekcji rewizji planów dla Nadleśnictwa Żedania (Regionalna Dyrekcja Lasów Państwowych w Białymstoki), miejscowy Oddział Biura Urządzania Lasu i Geodezji Leśnej przeprowadził eksperyment polegający na analizie możliwości wsparcia prac z zakresu inwentaryzacji zasobów leśnych i planowania gospodarki leśnej technikami geomatycznymi opartymi na lotniczym skaningu laserowym.
EN
Airborne laser scanning in forest management. Standard forest management work were carried out within the revision of plans for Żednia Forest District (Regional Board of National Forests in Białystok). The local division of Forest Management and Geodesy Bureau has conducted an experiment to investigate the possibility to support inventory of forest resources and forest managemetn planning with geomatic methods based on airbornelaser scanning.
2
Content available remote Techniki teledetekcyjne w inwentaryzacji urządzeniowej lasu
EN
In the paper, preliminary results of research are presented. The project was executed by the Forest Management and Monitoring Unit of the Forestry Research Institute in cooperation with the GIS and Remote Sensing Laboratory at the Forest Ecology Department of the Forestry Faculty at the Kraków Agricultural Academy and was commissioned by the Directorate General of State Forests. Analysis of current state of the issue as discussed in world literature, not including results of the research of the authors. of this paper, was ordered by Forest Management Unit of the Forestry Research Institute. The aim of this research is assessment of currently available information sources about forests (alternative to traditional ground measurements) from the point of view of their possible use in forest inventory. Different remotely sensed data were assessed, including high-resolution Quickbird satellite images, panchromatic 1:13.000 aerial photos, AISA hyperspectral scanner images, DGPS measurements and others selected materials. Possible use of these sources of information on tree stands was tested in summer 2003 and 2004 in Staszów forest district (Regional Directorate of State Forests Radom) and in Niepo3omice forest district (Regional Directorate of State Forests Kraków). Usefulness of the following techniques was proved: 1) DGPS receivers and aerial and satellite images (QuickBird and aerial photos) in updating delineation of any internal boundaries in forest complexes; 2) registered digital images for acquiring information on crown closure of certain types of tree stands, species composition, number of trees and their spatial pattern; 3) laser scanning for acquisition of accurate data on tree height and vertical architecture of tree stands and landform features; 4) remote sensed data for evaluation of tree health status and for monitoring its changes in subsequent years of implementation of economic plans of forest regions; 5) combination of the a/m techniques for creation of a numerical model of land surface. It is forecasted that with the development of radar and laser techniques it will be soon possible to acquire precise information on the wealth of tree stands. In the conclusions: 1) attention was drawn to: a) limitations and flaws of these techniques such as cloudless weather and appropriate vegetation period for aerial and satellite photos, b) high price of QuickBird and IKONOS satellite images, expecting at the same time promotional prices, when IKONOS satellite receiving station is opened in Komorów near Warsaw; c) too small group of specialists in the area of processing and interpretation of aerial and satellite images in Poland; 2) the need for wider than up till now application of remote sensing techniques for acquisition of information for forest inventory was emphasized, first of all due its objectivity and usually higher accuracy as compared to traditional forest inventory practices.
EN
At the beginning of the paper, let us ask a question . Do forest maps have to be made in digital form? The answer is positive, because the new Instruction on Forest Management issued in 2003 says so. The same refers to the digital forest map (LMN) standard, introduced by Regulation No. 74/2001 of the Director General of the State Forests, which constitutes an integral part of the Regulation. Economic maps and survey maps as well as various thematic maps, which are necessary elements in forest management plans, are to be based on LMN. A thesis is advanced that in near future the whole forest management plan will be transferred to a forest district by means of an electronic carrier and approved by electronic signature. The works presented were performed by PROLAS company commissioned by the Z3otów Forest District and consisting in adaptation of the maps of the forest district to the LMN standard. The following issues are discussed: 1) source data provided by the employer to the contractor producing digital maps, 2) verification, updating and adaptation of the maps of the Z3otów Forest District to the LMN standard, 3) thematic maps made on the basis of the LMN. Attention was drawn to a number of problems resulting from implementing nature of these works. At the end, other experiences of the PROLAS company are presented, resulting from the fact that after completing works in the Z3otów Forest District, the company performed the same task in neighbouring Lipka Forest District and is conducting similar works in a few other forest districts. Attention is draw, among other, to problems connected with delineation of common boundary between these forest districts. It is concluded that: 1) introduction of digital maps in all forest districts is the best method to eliminate irregularities, 2) it is necessary to currently organise resources without waiting for the forest managements works to begin.
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