3D Modeling of Urban Areas by Close Range Photogrammetry Software & Geographic Information System (GIS)

The production of 3D models of urban areas, using aerial photographs, is of great benefit to companies and small engineering offices. But the major problem is the high cost of Digital Photogrammetry Workstations (DPWS) that are currently used for the production of this kind of models. In addition, the use of these workstations requires long experience and good knowledge in photogrammetry. In this paper, we propose an alternative solution for 3D modeling of urban areas from a stereoscopic pair of aerial photos, a low cost close range photogrammetry software and the applications of 3D modeling available in some Geographic Information System (GIS) platforms. The close range photogrammetry software is a low coast system, compared to DPWS, and it doesn’t require any spatial background in photogrammetry. This software is used to extract the heights of elements that exist in the study area. GIS is used to produce the 2D map from the aerial photo. This map and the height data are used later to produce the 3D model of the study area.

3D modeling of archeological sites using Geographic Information Systems (GIS)

3D models of historical sites and monuments are very interesting in archaeology and digital tourism fields. These models help archeologists document historical sites and analyze the relationships between their components. Moreover, 3D models constitute an attractive factor that encourages visiting sites and presents virtual information about cultural heritage. In this paper, we propose an approach that uses capabilities of CAD (Computer Aided Design) and GIS (Geographic Information System) systems to construct spatial and semantic database for historical sites and modeling them in 3D. Users of the mentioned database can use it to gather information about sites and to navigate across them via the animation capabilities in GIS. The proposed ideas will be applied on the historical site of Ras-SHAMRA in Lattakia. Spatial data concerning the site will be acquired form a topographic plan designed in 2004. These data will then be processed and introduced into GIS environment. ArcGIS software will be used to achieve an Archeological Information System (AIS) for the site and to construct a 3D model of the site and the royal palace.

Building And Evaluating Digital Elevation Models (Dem) Byusing Geographic Information System

This research aimed for using Geographic Information System (GIS) in producing Digital Elevation Model (DEM) for Dimas District, By applying various methods: Spatial Analyst, Geo Statistical Analyst, Triangulated Irregular Network (TIN), and interpolating DEM from contour lines. The study showed that the best methods for interpolating DEM is Kriging method, Which interpolated an evaluated surface for scattered points which had (Z values) whether they were closed or scattered from each other. And (TIN) method which required less area on hard disc to be stored comparing with other methods, and it's perfect for representing surfaces in wide areas, Also generating DEM from contour lines produced DEM which had very accurate representing for surfaces.

Digital Database for Tishreen University using GIS

The importance of research lies in the need to keep pace with the technological development of computer systems and technologies Modern methods, especially geographic information systems, in collecting, storing, analyzing and exiting Spatial information and linking it to metadata, modeling and scenarios Planners and decision-makers to assist them in planning and finding appropriate solutions for various problems.

Lec GIS 1/9

محاضرات مقرر نظم المعلومات الجغرافية - السنة الخامسة- قسم الهندسة الطبوغرافية- كلية الهندسة المدنية - جامعة تشرين

محاضرة 3/9 : GIS : مفهوم قواعد البيانات الجغرافية وربطها

محاضرات مقرر نظم المعلومات الجغرافية - السنة الخامسة- قسم الهندسة الطبوغرافية- كلية الهندسة المدنية - جامعة تشرين

محاضرة 5/9 : GIS :الطوبولوجيا + معالجة المعطيات المكانية

محاضرات مقرر نظم المعلومات الجغرافية - السنة الخامسة- قسم الهندسة الطبوغرافية- كلية الهندسة المدنية - جامعة تشرين

محاضرة 8/9 : GIS :التحليل المكاني2 في GIS

محاضرات مقرر نظم المعلومات الجغرافية - السنة الخامسة- قسم الهندسة الطبوغرافية- كلية الهندسة المدنية - جامعة تشرين

Analytical Study of the factors affecting the Location-Based Services

location-based service applications have become increasingly popular in recent years as the increased use of these services has prompted researchers to pay attention to many factors affecting quality of service, such as accuracy, availability, responsiveness, and power consumption. In this paper an analytical study of these factors was presented and a series of adaptive solutions were introduced that significantly reduce energy consumption, thus increasing the efficiency of location-based service applications.

Analyse of Road Accidents in Homs City (Syria) in GIS Environment

Geographic Information Systems) GIS), and its advanced spatial and statistical analysis of traffic accidents at the city level, play a key role in improving traffic safety and urban development. This paper presents a general methodology for spatial and statistical analysis of traffic accidents within Homs city during three consecutive years 2007, 2008 and 2009. Maps are produced representing the spatial distribution of point traffic accidents within the city where is covered with a network of squares (300 m * 300 m) to identify the most dangerous areas in terms of the number of accidents. A map representing the most dangerous road segments is also produced in Homs city. In addition, the analysis of statistically significant hot spots (Getis-Ord Gi *) is performed. Through this study and the maps produced, dangerous areas and roads segments that have the largest number of accidents during the three years are well identified. These maps can be presented to decision-makers in the field of transport and traffic to study them from all aspects and work to solve the problems that led to an increase in the number of accidents.