Surveying and Geoinformatics - Scholarly Publications

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Browsing Surveying and Geoinformatics - Scholarly Publications by Author "ABIODUN, O.E."

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    Open Access
    An Algorithm for Least Squares Computation Using the Manifold and Hilbert Space Dialectics
    (Theoretical Mathematics & Applications, International Scientific Press, 2012-03-12) OLALEYE, J.B.; ABIODUN, O.E.; OLUSINA, J.O.
    The method of least squares is widely used in numerical analysis of data in all applied quantitative fields. Although there is only one least squares criterion, several schemes have been used for its implementation. The manifold approach treats the entire least squares process, including the representation of the variables, the model formation and the computations, in terms of manifolds. A manifold is a group of variables or functions taken together and treated as an entity in the computation process. This paper presents the least squares optimization on the manifolds and shows that the express formation and solution of the usually formidable normal equations can be avoided by employing the Hilbert space axioms and methods in the Euclidean space generated by the axial manifolds. The sequential and systematic approach of the new scheme, the preservation of the group structure and the analytical insights it provides for understanding the fundamental geometry of the least squares problem, all of which are demonstrated in the sample applications presented, support the conclusions that the manifold approach is less daunting, requires less core storage space and facilitate better understanding of the problem and the solution.
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    Open Access
    Application of GIS Technology to Geospatial Location of Lagos State Fire Stations, Nigeria
    (Indian Journal of Geomatics, Indian Society of Geomatics, 2018-04-01) OMOGUNLOYE, O.G.; Otavboruo, B.E.; ABIODUN, O.E.; OLUNLADE, O.A.; Emesani, E.G.
    The number of lives and properties lost to fire outbreak has heightened the need for evaluating the efficiency of fire stations within Lagos State, Nigeria. In 2016, over 16 billion naira was lost to fire in the State. This research examined the application of GIS technology to geospatial location of Lagos State fire stations and their efficiencies. The aim of this research is to evaluate fire station distributions in relation to population and economic level within Lagos State using GIS technology. This evaluation provides various analyses to support efficient planning of fire services and identify areas that are less serviced within Lagos State. To accomplish this aim, graphical representation, Euclidean buffers, and network analyst, closest to facility mapping tool were used. The main data used were; Lagos State base map, XY coordinates of commercial/industrial buildings, thirty-four fire stations, (Federal, state and privately owned), and road network of Lagos State. The study revealed that within 1km coverage area, these thirty-four (34) fire stations owned by Lagos State (14 fire stations), Federal (8 fire stations) and Privately owned (18 fire stations) are insufficient for efficient service in the populated areas of Lagos state. The paper recommends need for more geospatially located fire stations in the populated areas of Lagos State for enhancing and achieving better and safe environments.
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    Open Access
    Geodesy and environmental management: – a case for the adoption of geomatics engineering
    (Nigerian Journal of Geodesy, Nigeria Association of Geodesy, 2018-11) OLALEYE, J.B.; ABIODUN, O.E.; BABALOLA, A.
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    Open Access
    GPS Derived Orthometric Height for Small Engineering Surveys
    (Journal of Engineering Research, Faculty of Engineering, University of Lagos., 2009-03) OLALEYE, J.B.; ISIOYE, O.A.; ABIODUN, O.E.
    Global Positioning System (GPS) measures heights related to the ellipsoid. GPS height differences do not reflect the direction of flow under the influence of gravity and are not physically meaningful. This makes heights from GPS of little or no use in engineering surveys and geophysical explorations, many engineering applications require heights that are related to a physically meaningful surface such as the geoid. Such physically meaningful heights are the orthometric heights. This paper reviews the different error sources affecting GPS determined heights and demonstrates the use of geometric (local) geoid model for determining orthometric heights from GPS levelling as may be required for small engineering projects.
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    Open Access
    Investigation of flood (waterlog) flow pattern of University Road and Dan Fodio Boulevard in Akoka, Yaba, Lagos, Nigeria.
    (Indian Journal of Geomatics, Indian Society of Geomatics, 2021-04-01) Omogunloye, O.G.; OLUNLADE, O.A.; ABIODUN, O.E.; MOSHOOD, A.I.; BABATUNDE, O.A.
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    Open Access
    Mapping the Impact of Land Use and Land Cover Change on Urban Land and Vegetation in Osun State, Nigeria
    (Nigerian Journal of Environmental Sciences and Technology, Faculty of Environmental Science, University of Benin, 2019-10-01) ABIODUN, O.E.; AKINOLA, D.J.
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    Open Access
    On the Optimal Method of Surface Gravity Prediction Using Different Trend Surface Algorithms
    (Journal of Engineering Research, Faculty of Engineering, University of Lagos., 2009-06) OLALEYE, J.B.; ISIOYE, O.A.; ABIODUN, O.E.
    Text attached
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    Open Access
    Orthogonal and Spectral Decomposition Algorithms for the Optimal Estimation of Parameters from Indirect Measurements.
    (Journal of Engineering Research, Faculty of Engineering, University of Lagos., 2018-12) ABIODUN, O.E.
    Texts attached
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    Open Access
    The Pattern and Drivers of Urban Expansion in Greater Lagos from 1984 to 2006.
    (Journal of Environmental Sciences and Resources Management, Centre for Promotion of Educational and Scientific Research, 2015-12) ABIODUN, O.E.; OLALEYE, J.B.; OLUSINA, J.O.; Omogunloye, O.G.
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    Open Access
    The relevance of Surveying in National Economic Development
    (Nigerian Journal of Surveying and Geoinformatics, Nigeria Institution of Surveyors, 2016-03) OLALEYE, J.B.; ABIODUN, O.E.; OLUSINA, J.O.
    Text attached
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    Open Access
    Surveyors and the Challenges of Digital Surveying and Mapping Technology
    (Surveying and Land Information Science, American Society of Geodetic Surveying, the National Society of Professional Surveyors and Geographic and Land Information Society., 2011-03) OLALEYE, J.B.; ABIODUN, O.E.; OLUSINA, J.O.; ALADEMOMI, A.S.
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    Open Access
    UAV-Based 3D Model of Part of University of Lagos Main Campus.
    (Journal of Geomatics and Environmental Research, Department of Surveying and Geoinformatics, University of Ilorin, 2020-10-03) ABIODUN, O.E.; LAWAL, A.B.; LAWAL, F.; MUSTAPHA, A.
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    Open Access
    Urban Sprawl Analysis and Transportation Using Cellular Automata and Markov Chain
    (Physical Science International Journal, Sciencedomain International, 2014-01-10) OLUSINA, J.O.; ABIODUN, O.E.; Oseke, J.I.