With the acceleration of global warming, research on forests has become important. Vertical forest structure is an indicator vitality and diversity. Therefore, further studies are essential. The investigation structures traditionally been conducted through in situ surveys, which require substantial time money. To overcome these drawbacks, our previous study, vertical was mapped machine learning...

Novel technique for enhanced visual recognition of the landform features developed by spatial analysis on the digital terrain model (DTM) is proposed. The approach called “visibility simulation technique” is consisted form the following steps: (1) visibility calculation, (2) altering an azimuth and zenith angle (following the proposed algorithm), (3) generating continuous surfaces that indicate...

The book Preteklost in prihodnost ('The past and the future') is sixteenth volume GIS v Sloveniji (GIS Slovenia) series commemorates its 30th anniversary. goal of to present wide variety research findings on geographical information systems Slovenia recent years. Powerful geoinformatic tools precise data facilitate processes phenomena, their modelling. presents project outputs results areas suc...

Unmanned Aerial Vehicle (UAV) is nowadays a valuable source of data for inspection, surveillance, mapping and 3D modeling issues. UAVs can be considered as low cost alternative to the classical manned aerial photogrammetry, because they provide users with high spatial resolution images up centimeter limit. Following typical photogrammetric workflow, results like Digital Surface or Terrain Model...

In Decentralized Trust Management (DTM) authorization decisions are made by multiple principals who can also delegate decisions to each other. Therefore, a policy change of one principal will often affect who gets authorized by another principal. In such a system of influenceable authorization a number of principals may want to coordinate their policies to achieve long time guarantees on a set ...

introduction: pyrethroids are important insecticides because of their high activity and low mammalian toxicity. some studies have demonstrated that these insecticides, especially compounds with an -cyano group, produce toxic effects on various biological systems. deltamethrin (dtm) is a type ii synthetic pyrethroid insecticide containing -cyano group and is used worldwide in agriculture, home...

This study presents a methodology for derivation of fractional canopy cover, detection of main tree species, and extraction of forest stands using logistic regression, airborne remote sensing data and field samples. In a first step, canopy height models (CHMs) are generated using medium point density LiDAR DSM and DTM and a high-quality matching DSM. Then, fractional canopy covers are calculate...

In this study, a parallel processing method using a PC cluster and a virtual grid is proposed for the fast processing of enormous amounts of airborne laser scanning (ALS) data. The method creates a raster digital surface model (DSM) by interpolating point data with inverse distance weighting (IDW), and produces a digital terrain model (DTM) by local minimum filtering of the DSM. To make a consi...

The production of orthophotographs at large scales for architectural photogrammetric applications faces a number of problems. The main difficulty arises when the ratio of the elevation differences on the object surface to the distance from the camera is large, or when there are surfaces with poor definition or little texture. In these cases the standard automatic DTM production algorithms fail ...

LIDAR (Light Detection and Ranging) is one of the most recent technologies in surveying and mapping. The LIDAR is based on the combination of three different data collection tools: a laser scanner mounted on an aircraft, a Global Positioning System (GPS) used in phase differential kinematic modality to provide the sensor position and an Inertial Navigation System (INS) to provide the orientatio...