Geographia Technica, Vol 12, Issue no. 1/2017, pp. 31-45
DATA ADJUSTMENT OF THE GEOGRAPHIC INFORMATION SYSTEM, GPS AND IMAGE TO CONSTRUCT A VIRTUAL REALITY
Adel FRIDHI, Benzarti FAOUZI, Amiri HAMID
ABSTRACT: Visualization of spatial data in a virtual reality environment is catching the imagination of researchers across the disciplines of spatial information sciences and computer vision alike. Different approaches have been investigated into for visualization of three-dimensional objects in a virtual reality environment. An important aspect of creation of virtual world is the increasing interest shown by the research community in building virtual world database with contents of real world object. Geographic Information System, GPS and image techniques have become an important link in the process of creation of virtual worlds. In this paper we present a system for computing georeferenced positions and orientations of images of buildings. Providing such information is a mandatory step to well conditioned large scale and precise 3D reconstruction of urban areas. Our method is based on the registration of multimodal datasets, GPS measures, geolocation, and rough 3D models to create a virtual reality. The 3D modeling of an environment has long been a widely studied topic. Its importance stems from the various applications of such a modeling: virtual reality, extended reality, etc. The difficulties are: the creation of a geolocated virtual reality of an environment via Google Earth, a large-scale data acquisition, a large-scale data processing.
Keywords: Modeling, 3D, GPS, GIS, Geolocation, Virtual reality.
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