Nigeria is endowed with abundant natural resources of which petroleum resources play a dominant role in the economy. These resources can be effectively harnessed and managed for the benefit of all Nigerians. Unfortunately, the distribution of petroleum products in the Nigerian economy is fraught with complex problems resulting sometimes in petroleum products outages, inflated prices of products and contentions on the pump price of products. The aim of this paper is not only to evaluate the distribution of petroleum products in the country but to apply Geographical Information System (GIS) to highlight distribution weakness in the country. The research work was carried out using data acquired from NNPC, PPPRA and NEITI. These data was processed using GIS. The findings from the study show that the distribution system of petroleum products in Nigeria is ineffective and inefficient due to a number of factors which have been identified. To meet all this demand for these products without provoking market imbalances, the right supply levels are needed. Measuring this is always a challenge for the experts who work in the oil industry. Thus, the use of GIS should be employed in the downstream sector of oil industry.

In Global Positioning System (GPS) survey, post processing technique has proved to be the most efficient means of obtaining precise and accurate positional results. Different types of post-processing software are available and surveyors use them at random without knowing their comparative efficacy. Trimble software packages can be used to post process GPS data in order to determine final positions of points on earth’s surface. However, these packages have not been compared to determine which of the software is better than the others under certain circumstances. Therefore, this study attempts to assess and compare positional results of points obtained using Trimble Business Centre (TBC), Trimble Total Control (TTC) and Trimble Geomatics Office (TGO) software for post processing GPS survey data of the same study area. The survey data was processed at 150, 250 and 350 satellite elevation angle using 24 hours GPS (at 30 seconds interval) RINEX data of four stations. These are FUTY Continuously Operating Reference System (FUTY CORS), DDD1, DDD2 and DDD3 stations for GPS week 1622 and Day 40. The results obtained revealed that TBC has the least Root Mean Square Errors (RMSE) and Trace of variance-covariance matrix in the baseline domain. Also, in the coordinate domain, TBC gave the least value of coordinate variance. TGO produced the highest values of RMSE and Trace of variance-covariance matrix in the baseline domain and also the highest variance in coordinate domain. Therefore, TBC was found to give more consistent and satisfactory positional results than TGO and TTC. Hence, TBC is recommended, as the most appropriate commercial software for post processing GPS surveying data.

The convergence of the internet, wireless and location technologies has been creating new opportunities for mobile devices. Mobile location-based system (MLBS) has emerged as a critical field of study in mobile communication. The study investigates the technologies used to develop Location-Based Systems (LBS) and describes various methods of consuming such systems. It features significant programming logics and processes needed to successfully implement an adequate Location-Based System. To explore this cutting-edge technology in a user-friendly manner, a real-world application was developed to demonstrate the processes and platforms deployed to consume LBS. The demo which could be deployed on seven different platforms including Android, Blackberry, Symbian etc, utilizes legacy data storage based on Microsoft.Net Windows Communication Foundation WCF (Restful Services) and MS SQL Server. The developed product is a hybrid application that helps mobile user find businesses and places closest to them or in their suggested area in order of proximity. The work demonstrates practicable solution to developing and consuming multi-platform, light weight, cross-domain mobile enabled Location-Based Systems.