Effective 3-D surface modeling for geographic information systems
Yuksek, K. and Alparslan, M. and Mendi, E.
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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 opptimized 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.... Show more Show less