Browsing by Author "IPADEOLA, A.O."
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Item APPLICATION OF ITERATIVE SIMILARITY TRANSFORMATION (IWST) DEFORMATION DETECTION METHOD USING COORDINATE DIFFERENCES FROM DIFFERENT OBSERVATIONAL CAMPAIGNS IN LAGOS, NIGERIA(NIGERIAN INSTITUTION OF SURVEYORS, 2016-03) OMOGUNLOYE, O.G.; IPADEOLA, A.O.; SHITTU, O.A.; OJEGBILE, B.M.In this study, application of deformation in geodesy is presented. This paper presents a deformation analysis of control network with a focus on procedure that consists of network design, network adjustment of individual campaigns, trend analysis and deformation detection of the displacement field. The Iterative Weighted Similarity Transformation (IWST) robust method of analysis has been adopted and applied in determining the trend of movements and deformation detection for all the common points in the network. The developed procedure has been implemented in a program package developed using MATLAB software. Two campaign sets of data of control stations within Lagos State, Nigeria were used. The coordinate changes in the point positions were investigated. Results from the analysis indicate that all the stations have undergone movements but not all are significantly deformed. Results from the deformation and statistical analyses indicate that all the points have undergone movements but not all are significant. At 95% significance level chosen for the Fisher’s distribution (F) (i.e., PTItem APPLICATION OF LEAST ABSOLUTE SUM (LAS) TECHNIQUE FOR DETECTING DEFORMATION OF STRUCTURES(NIGERIAN INSTITUTION OF SURVEYORS, 2016-03) OMOGUNLOYE, O.G.; SHITTU, O.A.; IPADEOLA, A.O.; OJEGBILE, B.M.This study focuses on the deformation analysis using a geodetic method known as the Least Absolute Sum. The method consist mainly of independent adjustment of each epoch data, Compatibility test on their a-posteriori variances, followed by determination of trends of movement for all the common points in the network. A triangulation network was designed consisting of 45 YTT series second order control points within the study area resulting in a total of 63 triangles, 189 observations and 90 unknown parameters with 90% degrees of freedom. The network adjustment was done using the method of least squares observation equation. The estimated variance factors for the 2D (Horizontal) network were 7.82989325645394e-08 and 7.7207636996395e-08 while 0.03944 and 0.052339 represent the estimated variance factors for the 1D (height) for the first and second epochs respectively. The compatibility of the two epoch data was tested with the variance ratio and the compatibility test passed. Actual displacement vectors were computed and transformed into the same computational base using S-transformation by Least Absolute Sum (LAS), stable and unstable points were determined using single point displacement test. The displacement vector magnitude was computed, represented graphically to indicate possible trends of movement that might have occurred. This study finds Least Absolute Sum (LAS) technique useful in studying the deformation of large engineering structures such as high rise buildings, bridges, dams, oil exploration zones, mining sites and land slide monitoring.Item DECISION MAKING IN SURVEYING AND GEOINFORMATICS(FACULTY OF ENVIRONMENTAL SCIENCES, 2018) BABALOLA, A.; IPADEOLA, A.O.; ISSA, B.S.One of the most important decisions that a surveyor has to make before embarking on a given surveying project is the selection of the instrument. Where there are number of choices, a decision by way of selection has to be made. The selection can be based on a number of criteria, for instance, accuracy, cost, user friendly, size of project, user knowledge and experience, project type and duration. The need to have the best equipment for the right job cannot be overemphasized. This requires that the surveyor should select the equipment to be used in an objective way, taking into cognizance all factors and their priorities. The aim of this paper is to demonstrate the use of the Analytical Hierarchy Process (AHP) as a form of decision-making methodology in the selection of equipment for a surveying project. Priority weights for each factor controlling the choice are also determined. 3 instruments were considered for selection – Total station, DGPS and theodolite and 7 elements used in the instrument selection - accuracy, cost, user friendly, size of project, experience/ knowledge, project type and duration. The accuracy of the equipment appears to be the element with the highest importance. While experience and knowledge accounted for the next element on the level of importance. The element with the least importance user friendly element.Item GEOSPATIAL ANALYSIS OF THE LAND USE AND LAND COVER CHANGES OF ILORIN METROPOLIS BETWEEN 2000 AND 2017 USING REMOTE SENSING AND GIS TECHNIQUES(DEPARTMENT OF SURVEYING AND GEOINFORMATICS, FACULTY OF ENVIRONMENTAL SCIENCES, UNIVERSITY OF ILORIN, ILORIN, 2018-12) IPADEOLA, A.O.; ODUNAIYA, A. K.; TELLA, A.K.; ISSA, B. S.; Yusuf, A.; OLABODE, T. B.The paper focuses on geospatial analysis of the land use and land cover pattern in Ilorin metropolis using Remote Sensing and Geographic Information System technique (GIS). Rapid land use change has taken place in many developing cities of Nigeria includingIlorin over the past decades. Information on the constant change in land use pattern for Ilorin metropolis is of importance because the city is experiencing rapid land use/cover changes and because land use/cover pattern information is indispensable for sustainable rural-urban land use planning and development. Landsat 7 and 8 images of Ilorin metropolis at three epochs of the years 2000, 2010 and 2017 were used. Environment for visualizing images (ENVI) and ArcGIS software were used for the image classification, image enhancement and further processing, analysis and land use map production. The Land consumption rate and land absorption coefficient pattern were analyzed. The results show that water body increased significantly from 0.474%, 0.474ha area in 2000 to 0.589% in 2010 and experienced even a greater increase in 2017 with 0.731% with an of 7.914ha of the total class. Built-up land increased massively from 26.901%, 420.534ha area occupied in 2000 to 511.770ha, 39.439% area in 2010 and showed a slightdrop between 2010 and 2017 to 501.822ha representing 46.333% of the total class. In 2000, vegetation occupies 36.254%, 566.748ha but experienced an increase of 9.33ha area and occupied the highest class with 42.956% in 2010 but showed a massive decrease in 2017 to 358.761ha and 33.124% of the total class. Bare land showed a consistent decrease from 2000 with 568.593ha, 36.372% to 220.806ha, 17.016% in 2010 to 214.581ha, and 19.812% area of the total class in 2017.The study reveals increase in population of the metropolis, steady but increasing trend in built up land and reduction in vegetation. If adequate measures are not put in place, there may be a great measure of loss of naturally vegetated area in Ilorin metropolis, which is mainly because of urban growth and expansion, farming and gully erosion. This paper also confirms the convenience, accuracy and reliability of GIS and Remote Sensing techniques for geospatial analysis of landuse and land cover changes. It is recommended that the information from the results of this work should be use to optimally, effectively plan, and manage the study area.Item GIS AS A TOOL FOR SUSTAINABLE DEVELOPMENT IN PUBLIC SECONDARY SCHOOL MAPPING(DEPARTMENT OF SURVEYING AND GEOINFORMATICS, FACULTY OF ENVIRONMENTAL SCIENCES, UNIVERSITY OF ILORIN, ILORIN, 2019-04) IPADEOLA, A.O.; ABDULYEKEEN, A.O.; OLATUNDE, G.The paper focuses on using GIS as a tool for sustainable development in public secondary school mapping of Ilorin west local government area of Kwara State, Nigeria. The purpose is to map and carry out geospatial analysis of the public secondary schools in the study area to enable effective and efficient planning and management of the public secondary schools in a sustainable manner. This has been achieved through identification of the public secondary schools in the study area, mapping of the schools through the satellite imagery and global positioning system (GPS) technology, generating the attribute data of the schools, creation of GIS database for the schools and finally carry out geospatial analysis of the school data. The base map of the study area was obtained using SAS planet software package. The school addresses were obtained from the Kwara State ministry of education while the geospatial locations were obtained by field observations using GPS receivers and the attribute data through the administration of questionnaires and interviews with major stakeholders of the schools. A GIS database was created, the spatial and attribute data encoded, and geospatial analysis carried out including production of relevant maps using QGIS software. The resulting school location, student gender ratio, staff-student ratio, year of establishment and school type maps provides stakeholders with relevant maps and working environment for data management and also allows efficient query of information needed for decision making that would aid in sustainable development of the schools and education sector.Item POWERLINE ELECTRIC HAZARD VULNERABILITY MAPPING: A CASE STUDY OF FEDERAL UNIVERSITY OF TECHNOLOGY, AKURE, ONDO STATE(DEPARTMENT OF SURVEYING AND GEOINFORMATICS, FACULTY OF ENVIRONMENTAL SCIENCES, UNIVERSITY OF ILORIN, ILORIN, 2018-12) ODUNAIYA, A.K.; IPADEOLA, A.O.; TUKKA, A.A.Electrical power remain one of the driving forces of any meaningful economic development, but many a times, losses are encounteredwhen disasters befalls as a result of non-compliance to the standard setback and height clearance provisions of the laws, regulations, and guidelines of the state for construction of this important infrastructure even in the most prestigious academic environment like the University. Utilizing the 3-Dimension data gathering surveying traverse method and GIS approach within the 577.97 hectaresof Land ofFederal University of Technology Akure, this research was able to cover about 241 Medium Tension (MT) poles, 28 Medium Tension/ Low Tension, 365 Low Tension (LT) poles and 6 Transformer. This finding revealed from analysis that the electrical hazard vulnerability (i.e. non-compliance with the guidelines, regulation and laws of Ondo state) level with respect to the MT poles, with standard 30m buffer, were 52%, 84% and 64% for the residential, institutional and educational buildings respectively and for that of LT poles were 64%, 69% and 67% of the residential, institutional and educational buildings respectively with 20m buffer. This study has shown that the compliance level is discouraging and it was recommended that adequate measures must be put in place by all relevant authorities of the University and the Benin Electrical Distribution Companies (BEDC) to forestall possible recurrence of imminent danger therefrom.