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Drzewa przydrożne w gminie Buczkowice (województwo śląskie)

Pietraszko Ewa

Polish Journal of Materials and Environmental Engineering

2022

Vol. 3 (23)

28--43

The research consisted of inventory and health status assessment of 105 roadside trees growing along Voivodeship Road 942 (Buczkowice commune, Silesian Voivodeship). During the study, dendrometric data, such as: tree height, circumference and diameter at the base and at the breast height, crown height, height to first branches, crown span and its shape were collected. Roadside trees, on the one hand, are aesthetic element of road surroundings responsible for environmental and protective functions, and on the other they effect on the safety of road users. Taking this into consideration, it is necessary to take care of regularity of maintenance activities and treatments to ensure proper trees health. At the same time, the proximity of the road may lead to need to remove some trees – e.g. during modernization and construction works related to road infrastructure. Roadside trees in the Buczkowice commune belonged to 13 species, among which 10 were deciduous tree species and 3 were coniferous species. The most numerous were black poplars cultivar ‘Italica’ (Populus nigra L. ‘Italica’, 21 specimens). Two invasive alien species (green ash Fraxinus pennsylvanica and black locust Robinia pseudoacacia) were found with a total number of 15. Three trees had circumference that corresponded to the circumference of monumental trees (two sycamores Acer pseudoplatanus and one black alder Alnus glutinosa). Trees health condition was based on presence of trunk and crown damage. Specifically, 53 of the examined roadside trees had satisfactory, 37 – average, 9 – good and 6 – poor health condition. In order to keep trees in good health, regular conservation and protection treatments are recommended. It was noted that such actions can help reduce the risk to road safety. The main threats to roadside trees were also indicated (collisions with vehicles, increase in salinity due to the use of chemicals to prevent road icing during winter and waste deposited around trees). In addition, the quantitative status of roadside trees in 2018 and 2022 were compared. Before 2022, 46 trees were removed as a result of road investments involving the construction of ring road of Buczkowice, sidewalk and bicycle path.

Low aerial imagery – an assessment of georeferencing errors and the potential for use in environmental inventory

Smaczyński M., Medyńska-Gulij B.

Geodesy and Cartography

2017

Vol. 66, no. 1

89--104

Unmanned aerial vehicles are increasingly being used in close range photogrammetry. Real-time observation of the Earth’s surface and the photogrammetric images obtained are used as material for surveying and environmental inventory. The following study was conducted on a small area (approximately 1 ha). In such cases, the classical method of topographic mapping is not accurate enough. The geodetic method of topographic surveying, on the other hand, is an overly precise measurement technique for the purpose of inventorying the natural environment components. The author of the following study has proposed using the unmanned aerial vehicle technology and tying in the obtained images to the control point network established with the aid of GNSS technology. Georeferencing the acquired images and using them to create a photogrammetric model of the studied area enabled the researcher to perform calculations, which yielded a total root mean square error below 9 cm. The performed comparison of the real lengths of the vectors connecting the control points and their lengths calculated on the basis of the photogrammetric model made it possible to fully confirm the RMSE calculated and prove the usefulness of the UAV technology in observing terrain components for the purpose of environmental inventory. Such environmental components include, among others, elements of road infrastructure, green areas, but also changes in the location of moving pedestrians and vehicles, as well as other changes in the natural environment that are not registered on classical base maps or topographic maps.