The extraction of a digital elevation model (DEM) from airborne lidar point clouds is an important task in the field of geoinformatics. In this paper, we describe a new automated scheme that utilizes the so-called “climbingand-sliding” method to search for ground points from lidar point clouds for DEM generation. The new method has the capability of performing a local search while preserving th...

To separate non-ground and ground is the first step of terrain feature classification for remotely sensed LIDAR (LIght Detection And Ranging) data. The LIDAR data, which were captured by airborne laser scanner, contain terrain surface height information. This paper aims to segment non-ground (buildings and high vegetation) from ground (flat field) in hilly urban areas. Gabor wavelets were appli...

Permanent ground deformations (PGDs) induced by slope failures cause catastrophic damage to buried pipelines. This paper presents a 2D plane-strain numerical analysis of the behavior 800 mm water transport pipeline in Aine-Tine (Mila, Algeria) subjected shallow PGD, as it could be triggered recent earthquake August 07th, 2020 (M= 4.9). The is carried out through application an incremental displ...

Haemonchus, Trichostrongylus, Ostertagia and Nematodirus worm populations of Angora goats, based on differential egg counts, are considered in relation to climatological and topographical data. Egg counts indicated that the estimated worm populations in goats that experienced wet circumstances were higher than those exposed to dry conditions. Wetness was assessed by relating spring, summer, and...

Ground surface changes caused by freeze-thaw action affect agriculture and forestry, as well artificial structures such roads. In this study, an area is examined in which reforestation urgently needed but the growth of naturally restored seedlings planted trees impaired action. Thus, a method measuring induced ground mitigating their negative impacts needed. Real-time kinematic unmanned aerial ...

Ground thermal properties are prerequisites for designing the size of borehole heat exchanger. In this study, a 3D transfer model is developed to simulate response test (TRT) shallow coaxial exchanger (SCBHE), and effects ground on slope mean value inlet outlet fluid temperatures studied. The results show that strongly affected by conductivity slightly capacity, capacity only has small effect s...