Results 91 to 100 of about 24,119 (299)

Detecting complex building shapes in panchromatic satellite images for digital elevation model enhancement

, 2010
In recent years Digital Elevation Models (DEM) gained much interest because of their high capability to give information about urban regions. DEM can be used or detailed urban monitoring, change and damage detection purposes.
Reinartz, Peter, d'Angelo, Pablo, Sirmacek, Beril   +2 more
core  

Accuracy Assessment of Point Clouds from LiDAR and Dense Image Matching Acquired Using the UAV Platform for DTM Creation

ISPRS International Journal of Geo-Information, 2018
In this paper, the results of an experiment about the vertical accuracy of generated digital terrain models were assessed. The created models were based on two techniques: LiDAR and photogrammetry. The data were acquired using an ultralight laser scanner,
Adam Salach, Krzysztof Bakuła, Magdalena Pilarska, Wojciech Ostrowski, Konrad Górski, Zdzisław Kurczyński   +5 more
doaj   +1 more source

Strengthening urban resilience in China through underground infrastructures management: Addressing global climate challenges with technological solutions

Deep Underground Science and Engineering, EarlyView.
This paper explores how climate‐resilient technologies, such as smart grids, digital twins, and self‐healing materials, can enhance urban resilience. It highlights the urgent need for proactive planning, public‐private collaboration, and data‐driven innovation to future‐proof underground infrastructure amid accelerating climate and urban pressures ...
Kai Chen Goh, Tonni Agustiono Kurniawan, Christia Meidiana, Abdelkader Anouzla, Faissal Aziz, Imran Ali, Joan Cecilia C. Casila, M. Imran Khan, Dongdong Zhang, Meihui Jiang, Mohd Hafiz Dzarfan Othman, Md Munir Hayet Khan, Kasun Kumara Dissanayake   +12 more
wiley   +1 more source

Urban object detection using a fusion approach of dense urban digital surface models and VHR optical satellite stereo data

, 2010
In this paper we describe a new approach for the extraction of urban objects from very high resolution (VHR) optical stereo satellite imagery. Such data is delivered from sensors like Ikonos, QuickBird, GeoEye or WorldView-II.
Reinartz, Peter, Krauß, Thomas
core  

A Vector Operation to Extract Second-Order Terrain Derivatives from Digital Elevation Models

, 2020
Terrain derivatives exhibit surface morphology in various aspects. However, existing spatial change calculation methods for terrain derivatives are based on a mathematical scalar operating system, which may disregard the directional property of the ...
Liyang Xiong, Guanghui Hu, Wen Dai, Guoan Tang, Sijin Li   +4 more
core   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Pre‐industrial land‐use limits contemporary shrub encroachment in the French Alps

Ecography, EarlyView.
Shrub encroachment has become a global phenomenon in recent decades. While global warming in the Arctic is often cited as the primary cause, human‐managed mountain regions have experienced intense historical land‐use that may also play a considerable role.
Baptiste Nicoud, Florian Carrière, Arthur Bayle, Christian Devlieger, Philippe Choler, Christophe Corona, Sandra Lavorel   +6 more
wiley   +1 more source

Use of plan curvature variations for the identification of ridges and channels on DEM

, 2006
This paper proposes novel improvements in the traditional algorithms for the identification of ridge and channel (also called ravines) topographic features on raster digital elevation models (DEMs). The overall methodology consists of two main steps: (1)
Rana, S.
core  

Climatic drivers prevail in montane and lowland Odonata latitudinal diversity gradients, but human modification erodes lowland patterns

Ecography, EarlyView.
Latitudinal diversity gradients (LDGs) arise from the interplay of historical, ecological, and evolutionary processes, yet these drivers may differ across landforms. Mountains, with steep elevational and climatic gradients, often sustain distinct diversity dynamics compared with adjacent lowlands, where vertical climatic gradients are weak and human ...
Zhenyuan Liu, Bo‐Ping Han, Haomiao Zhang, Ramiro Martín‐Devasa, Jens‐Christian Svenning, Janne Soininen   +5 more
wiley   +1 more source

Evaluation of high quality topographic data for geomorphological and flood impact studies in upland area: North York Moors, UK [PDF]

, 2006
A flash flood on 19th June 2005 caused more than one hundred landslides in the North-western North York Moors uplands, UK. This project aims to 1) assess digital elevation models (DEMs) in terms of statistical terrain analysis and 2) explore the ...
Dong, Lu
core