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Displaying 826 - 830 of 1605Improving classification accuracy of airborne LiDAR intensity data by geometric calibration and radiometric correction
Airborne light detection and ranging (LiDAR) systems are used to measure the range (distance from the sensor to the target) and the intensity data (the backscattered energy from the target). LiDAR has been used extensively to model the topography of the Earth surface. Nowadays, LiDAR systems operating in the near-infrared spectral range are also gaining high interest for land cover classification and object recognition. LiDAR system requires geometric calibration (GC) and radiometric correction (RC) in order to maximize the benefit from the collected LiDAR data.
Spatio-temporal patterns in vegetation start of season across the island of Ireland using the MERIS Global Vegetation Index
Spring phenophases such as the beginning of leaf unfolding, measured in the Irish gardens of the International Phenological Garden (IPG) network, indicate an earlier spring occurrence hence a longer growing season. However, these measurements are limited to selected species of trees at a few point locations in the southern half of the country. The aim of this study was to develop a methodology, based on satellite remote sensing, to measure the vegetation start of season (SOS) across the whole island of Ireland on an annual basis, complementary to existing ground-based methods.
Analyzing the contributing factors of timber demand in Bangladesh
This study investigates timber demand in Bangladesh. In evaluating timber demand, the significant contributing factors like forest land cover, frequency of furniture manufacturing, price of timber substitute, population growth and railway density have been examined. Panel data over a longer period for a developing country like Bangladesh were not easily available. The data sources were very sporadic for the study — there was no common data pool. A panel dataset over a 17-year period was simulated and analyzed for the study.
review of the role of property rights and forest policies in the management of the Sundarbans Mangrove Forest in Bangladesh
The purpose of this paper is to critically evaluate past forest management policies and property rights regimes in achieving sustainability of the Sundarbans Mangrove Forest (SMF) in Bangladesh. The adequacy of forest policies to reflect regimes of property rights in their design and implementation is examined using content analysis. The analysis synthesises forest policies of four distinct historical time periods, and the embedding of property rights during those periods using Schlager and Ostrom's typology.
Impact of urbanization on flooding: The Thirusoolam sub watershed – A case study
The change in the land use pattern due to rapid urbanization adversely affects the hydrological processes in a catchment, leading to a deteriorating water environment. The increase in impervious areas disrupts the natural water balance. Reduced infiltration increases runoff and leads to higher flood peaks and volumes even for short duration low intensity rainfall. Due to their destructive effects, floods can significantly increase the expenses on mitigation efforts. The present study focuses on the Thirusoolam sub watershed, an urban watershed in Chennai.