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Wykorzystanie chmur punktów z lotniczego skanowania laserowego do weryfikacji stanu aktualności wybranych obiektów w bazie geometrycznej leśnej mapy numerycznej

Ciesielski M., Bałazy R., Mitelsztedt K., Zawiła-Niedźwiecki T.

Roczniki Geomatyki

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2015

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T. 13, z. 3(69)

217--225

PL

Celem pracy było sprawdzenie możliwości wykorzystania danych z lotniczego skanowania laserowego do detekcji budynków na terenach leśnych. Ponadto sprawdzono możliwość wykorzystania tych danych do aktualizacji wybranych warstw z leśnej mapy numerycznej. W pracy przeanalizowano obszar leśny wraz z buforem 100 m wokół wydzieleń na terenie dwunastu nadleśnictw górskich, położonych na obszarach badawczych w Sudetach i Beskidach. Przy wykorzystaniu danych z lotniczego skanowania laserowego wykryto 515 budynków co stanowiło 89,2% wszystkich budynków znajdujących się w wektorowej warstwie wydzieleń leśnych. Na poszczególnych obszarach badawczych osiągnięto dokładność odpowiednio 80,5%, 94,2% i 91,2%. Podsumowując, lotnicze skanowanie laserowe może być wykorzystywane do aktualizacji wybranych warstw w leśnej mapie numerycznej, zawierających informacje o budynkach oraz obiektach budowlanych. Istniejące algorytmy detekcji budynków nie są bezbłędne, więc przyszłe prace powinny skupić się na poprawie dokładność analiz.

EN

The aim of the presented studies was to determine the ability to detect buildings in forest areas on the basis of airborne laser scanning data. Moreover, the usefulness of this data for updating selected items of the FDM has been evaluated. In this study forest areas with a 100 m buffer zone have been analyzed, including twelve mountain forest districts, grouped in three research areas located in the Sudety and the Beskidy Mountains. Using LiDAR data 515 buildings have been detected which represents 89.2% of all buildings in the vector layer of the digital forest map. In particular research areas the detection accuracy reached to 80.5%, 92.4%, 91.2%. As a result of the study it can be concluded that the airborne laser scanning data may be helpful in updating the selected layers of the digital maps of forest, containing information of forest engineering. Existing building detection algorithms are not error-free, so further research should be conducted to improve the accuracy of analyzes.

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Stan prac nad zintegrowanym systemem katastralnym w świetle potrzeb leśnictwa

Widawska Z.

Roczniki Geomatyki

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2006

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T. 4, z. 4

133-144

EN

Cadastre describes geometrical state of property, its legal status, natural and man-made components. The information added in many countries is the value of the property with is estimated in a special way for tax purposes. Integrated Cadastral System in Poland includes (according to the government.s program): estate cadastre, system of new realestate registers and tax records. The concept of multifunctional forestry, according to the rules of sustainable development, is valid for all forests. The proper tool for introducing such ideas could be a multifunctional cadastre with additional set of environmental data. In the paper the difficulties in creating an integrated cadastre and possibilities of using it are discussed.

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Aktualizacja leśnej mapy numerycznej z wykorzystaniem archiwalnych zdjęć z satelity IKONOS

Tomalski L.

Roczniki Geomatyki

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2006

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T. 4, z. 4

113-117

EN

In February 2006 the Director General of the State Forests appointed a task team for a test project to examine the use of satellite imagery. The commissioned task was to test the possibility of updating forest digital maps with the use of satellite images as well as to test the use of those images for other purposes. In the project, high resolution satellite images were used made by IKONOS satellite and the ortophotomap produced of those images. The test positively verified the possibility to use the ortophotomap for updating forest digital maps. In the next step it was decided to test, whether the ortophotomap could be the source data to verify the accuracy of the existing vector maps and to make new ones. To do that forest compartments of two forest districts picked by chance were digitalized and then the geometric shapes of objects created in this way were compared with the same objects on the existing maps. In conclusion of the test it was ascertained that the use of the ortophoto map made of high resolution satellite imagery from IKONOS satellite could improve accuracy but the imagery itself is not sufficient data source to produce all elements of the forest digital map.

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Mapa numeryczna w nowej Instrukcji Urządzania Lasu na przykładzie nadleśnictwa Złotów

Wójcik R.

Roczniki Geomatyki

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2004

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T. 2, z. 4

87-92

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.