Results 21 to 30 of about 255,255 (303)

TERRA: Terrain Extraction from elevation Rasters through Repetitive Anisotropic filtering

International Journal of Applied Earth Observations and Geoinformation, 2020
Over the past decades, several filters have been developed to derive a Digital Terrain Model (DTM) from a Digital Surface Model (DSM), by means of filtering out aboveground objects such as vegetation.
Anton Pijl, Jean-Stéphane Bailly, Denis Feurer, Mohamed Amine El Maaoui, Mohamed Rached Boussema, Paolo Tarolli   +5 more
doaj   +1 more source

Probability maps as a measure of reliability for indivisibility analysis [PDF]

Spatium, 2005
Digital terrain models (DTMs) represent segments of spatial data bases related to presentation of terrain features and landforms. Square grid elevation models (DEMs) have emerged as the most widely used structure during the past decade because of their ...
Joksić Dušan, Bajat Branislav
doaj   +1 more source

Enhanced visualization of the flat landscape of the Cambridgeshire Fenlands [PDF]

, 2015
The Fenlands of East Anglia, England, represent a subtle landscape, where topographic highs rarely exceed 30 m above sea level. However, the fens represent an almost full sequence of Quaternary deposits which, together with islands of Cretaceous and ...
Farewell, Timothy S., Hallett, Stephen H., Pritchard, Oliver G.   +2 more
core   +1 more source

Modelling the spatial distribution of DEM Error [PDF]

, 2005
Assessment of a DEM’s quality is usually undertaken by deriving a measure of DEM accuracy – how close the DEM’s elevation values are to the true elevation.
Bolstad P V, Burrough P A, Carlisle B H, Carlisle B H, Day T, Ehlschlaeger C R, Eklundh L, Evans I S, Fisher P, Fotheringham A S, Fotheringham A S, Giles P T, Guth P, Horn B K, Hunter G J, Kumler M P, Li Z, McDermid G J, Monckton C, Sasowsky K C, Theobald D M, Weibel R, Wood J D, Zevenbergen L W   +23 more
core   +1 more source

DEM ACCURACY RESEARCH BASED ON UNMANNED AERIAL SURVEY DATA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Currently, digital elevation models (DEM) created by photogrammetric method based on unmanned aerial survey data are becoming an increasingly popular product.
V. M. Kurkov, A. S. Kiseleva
doaj   +1 more source

Evaluating Suitable Analysis Methods Using Digital Terrain in Viewshed Analysis [PDF]

Journal of the Korean Association of Geographic Information Studies, 2011
The purpose of this study is to contribute enhancing the accuracy of viewshed analysis through the explanation for an analysis method of viewshed analysis using GIS. According to previous studies, the visible area using digital terrain in viewshed analysis depends on a visible interest area, scale of terrain, spatial resolution and surface data.
Chang-Hwan Yeo, Young-Jin Jang
openaire   +1 more source

Generating Terrain Data for Geomorphological Analysis by Integrating Topographical Features and Conditional Generative Adversarial Networks

Remote Sensing, 2022
With the development of artificial intelligence techniques for geographical knowledge discovery, simulated terrain generation based on deep-learning algorithms has become one practical way to construct accurate terrain data.
Sijin Li, Ke Li, Liyang Xiong, Guoan Tang   +3 more
doaj   +1 more source

Charting the Course for Future Developments in Marine Geomorphometry: An Introduction to the Special Issue

Geosciences, 2018
The use of spatial analytical techniques for describing and classifying seafloor terrain has become increasingly widespread in recent years, facilitated by a combination of improved mapping technologies and computer power and the common use of Geographic
Vanessa Lucieer, Vincent Lecours, Margaret F. J. Dolan   +2 more
doaj   +1 more source

Improvement of Terrain Entropy Calculation for Grid Digital Elevation Models Considering Spatial Structural Features

Applied Sciences
Existing methods for calculating terrain entropy in grid digital elevation models (DEMs) often face computational anomalies in specific topographies within small windows.
Fangbin Zhou, Tianyi Yao, Junwei Bian, Yun Xiao   +3 more
doaj   +1 more source

Research on colorized physical terrain modeling for intelligent vehicle navigation

Advances in Mechanical Engineering, 2018
Colorized physical terrain models are needed in many applications, such as intelligent navigation, military strategy planning, landscape architecting, and land-use planning.
Jingbin Hao, Hansong Ji, Hao Liu, Zhongkai Li, Haifeng Yang   +4 more
doaj   +1 more source