Tag Archives: Geographic Information System

Needs For Transportation Planning and Management In Nigeria Using Geographic Information System (Published)

Transportation is the act of transporting or the state of being transported; conveyance; often of people, goods, etc, while planning stands as the act of formulating of a course or courses of action, or of drawing up plans or programes for future events or activities. Geographic information system is a survey tool used to capture, store, query, analyze, manage and display geographic information/data (Kang-Tsung Chang, 2002). Geographic information system (GIS) technology has the ability to integrate common data base operations such as query and statistical analysis with unique visualization and geographic analysis. These abilities distinguish GIS from other information systems and make it valuable to a wide range of public and private enterprises for explaining events, predicting out comes and planning strategies. The objective of this article is to articulate the success of geographic information system applications in transportation planning. The methodology applied was the administration of questionnaires by stratified sampling to major stake-holders in GIS and transportation technology such as surveyors, traffic warden staff, road safety staff, police, some members of the national union of road transport workers, some staff of the Ministry of Transport (including the vehicle inspection officers), Staff of State Security services (SSS) and transportation planners. Secondary information were also obtained from books, journal articles and conference papers. The use of computer and some software made the research simpler. The results of the observations and analysis show that the centralized traffic control room can be made use of, to effectively manage the traffic. Information about the number of vehicles on each road, where there are jams and alternative roads can be displayed on electronic signboards installed at important traffic road junction. The discussions so far show that the use of GIS for transportation management is ideal and has come to stay universally, and so should be adopted in Nigeria.

Keywords: Geographic Information System, Management, Traffic, Transportation

Soft Copy Maps Are Indispensable in the Development and Operation of Modern Land Information System (LIS) and Geographic Information System (GIS) (Published)

Maps are visual expressions of positions of the earth’s surface. Features are depicted using various combinations of points, lines and standard symbols. Maps have traditionally been produced in graphics or hard copy form. Today most mapping is then processed using computer aided drafting and design (CADD) system to develop softcopy maps which are stored within a computer. It can be analyzed, modified, enlarged or reduced in scale, and have their contour intervals changed while being viewed on the monitors of CADD systems. Different types or “layers” of information can also be extracted from digital maps to be represented and analyzed separately, and softcopy maps can be instantaneously transferred to other offices or remote locations electronically. They can be printed in hard copy if desired. Softcopy maps are indispensable in the development and operation of modern Land Information Systems (LIS) and Geographic Information Systems (GIS). This article addressed digital base mapping methods. It discussed the control survey, which is the spatial foundation of the base mapping, It also discussed digital mapping methods using graphic digitizing methods, followed by aerial photography and processes necessary to create a photo-geometric base map.

Keywords: Digital Maps, Geographic Information System, Survey Controls