Several studies have examined the sensitivity of fronts and cyclones to model physics over the ocean or flat terrain in mesoscale models (e.g., Zhang et al. 1999). Nonetheless, fewer studies have examined the sensitivity of fronts and cyclones over complex terrain to model physics in the WRF model at very high resolution. Physics parameterizations in the WRF model, including multiple choices of...

Very detailed high-resolution (3D) digital terrain models can be obtained using airborne laser scanner data. However, laser scanning usually entails huge data sets even for moderate areas, making data management and analysis both complex and time consuming. For this reason, automatic terrain modelling and efficient storage structures supporting data access are needed. In this paper a number of ...

This work summarizes a novel approach for discrete terrain model construction and algorithms utilizing the terrain and road network data. The models and algorithms are baseline of SymSG Border Tactics constructive simulator focusing on border control operations performed by Border Guard forces involving local population, perpetrators and other actors. Developed simulation algorithms include sim...

Military training instructors increasingly often employ computer games to train soldiers in all sorts of skills and tactics. One of the difficulties instructors face when using games as a training tool is the creation of suitable content, including scenarios, entities and corresponding terrain models. Terrain plays a key role in many military training games, as for example in our case game Tact...

As digital terrain models are indispensable for visualizing and modeling geographic processes, terrain information content is useful for terrain generalization and representation. For terrain generalization, if the terrain information is considered, the generalized terrain may be of higher fidelity. In other words, the richer the terrain information at the terrain surface, the smaller the degre...

Following the development of synthetic aperture radar (SAR), SAR images have become increasingly common. Many researchers have conducted large studies on geolocation models, but little work has been conducted on the available models for the geometric correction of SAR images of different terrain. To address the terrain issue, four different models were compared and are described in this paper: ...

In this paper, we describe, analyze and compare techniques for extracting spatial knowledge from a terrain model. Specifically, we investigate techniques for extracting a morphological representation from a terrain model based on an approximation of a Morse-Smale complex. A Morse-Smale complex defines a decomposition of a topographic surface into regions with vertices at the critical points and...

Terrain data of very large scale is widely used in many applications, such as virtual reality, environmental analysis, and GIS. The large size of terrain data makes it very demanding on memory and processing power during visualization and spatial analysis. Multi-resolution techniques have been introduced to address this problem. A Multi-Resolution Terrain Model (MRTM) can provide a large number...

This paper describes pertinent digital terrain model data structures, namely, grid/raster, quadtree, and triangular irregular network. A basic concept of DIM data structure is also explained. The aspects of TIN storage, TIN data structure conversion, advantages and disadvantages of each structure are discussed. A complete data structure conversion program is also presented. n. 1.0 INTRODUCTION ...