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Optimization of GIS Information In Railways Networks by Integration of Global Positioning Systems (GPS) and Multimedia Systems
Abbasali Jandaghi Alaei Abbas Safaye Kaffash Azadeh Mousavi Bahram Moradi Soloushi Hosein Naderi Davood Mansoori Statistic & IT dept. of R.A.I. (Iranian Railway Organization) Tel : +98+215124424 Fax : +98+215124625 Email: railwaygis@irirw.com Abstract: Implementation of a GIS system In Railways is one of the long time goal because of existence of huge amount of Data in this Industry. For this reason we assigned a operational team for collecting positional data for Construction of several layers of graphical data which are important and applicable to decision support and then transfer these data to integrated data bases. Constructing of positional and descriptive data in Railway is a long process and to expedite and optimize management of collecting, processing (Analyzing) ,controlling and then storing refined data and also reducing the costs with respect to accuracy and correctness which are needs for use of GPS and Multimedia integration method has been achieved. To analyze and evaluate of our needs, current situation of data, assets, cost, time, acceptance and willingness of cooperation from different departments with respects to what GIS can do is one of our achievement in pilot project. In spite of many data acquisition constraints we were successful in designing and development software for translation of films to pictures, automation of Input and process of data, development of intermediary software and ability to broadcast multimedia films, interface and storing of about 700 GIGA Bytes of information in databases. The mentioned system has successfully completed its mission and its intermediary software can be used in computer networks. It was possible for our system to correct the mistakes which happens during data collection and any other part of analyzing. It has been found that this method has less cost and consume less time and provide better ability to analyze the data compare to the other system so far used. Introduction: Optimization of using railway in each country is essential for political and economical development ,Because large amount of goods and passenger and commercial and economical exchange by railway. In each system essential assets like, construction, installation, machines, factories and so on, can cause growth and progress, so for accurate proper management and precise and updated information is necessary. After analyzing, recognition and primitive design, one of the important things for GIS Implementation is data acquisition. Collecting and organizing data in digital format is necessary for creating GIS in each system [5]. Spatial data acquisition, storing and organizing them can be done by different methods and have important role in the GIS activities. Available information in railway industry such as, plane and profile of track, stations, features (objects) in the buffer of rail track, geometric information (Superelevation, Curve, slope, … ) technical construction (Tunnel, Bridge, Drainage, Territory walls, Buildings ,… ), train and wagon have spatial attribute characteristics that can be organized by GIS. In this article we introduce a method that work by integrating of GPS and Multimedia system. This can be used as a tested and successful method by different organization. Data Acquisition And Information Management In GIS There are different methods for data acquisition from field, Using Traditional or digital maps, satellite images, Global positioning system(GPS), each of this methods have advantages and disadvantages. for example preparing digital railroad map by digitizing the paper of them can make overshoot or undershoot mistake, in addition this map are old and should be updated (figure1)[4].  Figure1 :Methods of spatial and attribute information input in GIS Although satellite Images can cover the information of large amount of ground, using satellite images with fit spatial resolution need high charge and creating relation between image and ground is time consuming. Therefore , using GPS and computer with fast process rate is suitable [1], but selecting a fast and accurate way that reduces cost, need a special process. In this research a program was written in Visual Basic language, which have relation with a database in SQL Server and can get information of eight GPS with eight external ports. By this method we can collect spatial data from the field quickly (figure2).  Figure2: Designed Software for collecting data by GPS
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