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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 1 | Copyright
Nat. Hazards Earth Syst. Sci., 16, 123-133, 2016
https://doi.org/10.5194/nhess-16-123-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 18 Jan 2016

Research article | 18 Jan 2016

Effective 3-D surface modeling for geographic information systems

K. Yüksek1, M. Alparslan2, and E. Mendi3 K. Yüksek et al.
  • 1Turkish Aviation Academy, Turkish Airlines, Istanbul, Turkey
  • 2Computer Engineering Department, Istanbul Kultur University, Istanbul, Turkey
  • 3Computer Engineering Department, KTO Karatay University, Konya, Turkey

Abstract. In this work, we propose a dynamic, flexible and interactive urban digital terrain platform with spatial data and query processing capabilities of geographic information systems, multimedia database functionality and graphical modeling infrastructure. A new data element, called Geo-Node, which stores image, spatial data and 3-D CAD objects is developed using an efficient data structure. The system effectively handles data transfer of Geo-Nodes between main memory and secondary storage with an optimized directional replacement policy (DRP) based buffer management scheme. Polyhedron structures are used in digital surface modeling and smoothing process is performed by interpolation. The experimental results show that our framework achieves high performance and works effectively with urban scenes independent from the amount of spatial data and image size. The proposed platform may contribute to the development of various applications such as Web GIS systems based on 3-D graphics standards (e.g., X3-D and VRML) and services which integrate multi-dimensional spatial information and satellite/aerial imagery.

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