Surveying and Geoinformatics - Scholarly Publications

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Browsing Surveying and Geoinformatics - Scholarly Publications by Author "Alademomi, A.S."

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    Open Access
    Creation of a Cell-Based Digital Cadastral Mapping System (Digital Cadastre): A Case Study of Goshen Beach Estate, Lekki Peninsula, Victoria Island.
    (2011-12) Olusina, J.O.; Olaleye, J.B.; Alademomi, A.S.; Ojie, T.I.
    The analogue ways of land administration over the years in developing countries have brought retrogression to land development and its sustainability as a limited natural resource. The use of pencil and papers in land management is outdated and has reduced efficiency. Fast delivery of land related products from government authorities and the private sector takes weeks or months. The need for transformation from analogue approach (traditional cadastre) into the digital technology era (digital cadastre) in order to derive the seemingly unlimited benefits is pertinent. Digital cadastre enhances land transaction activities to be conducted in a business manner. Similarly, land subdivision or boundary redefinition, land registration and land marketing are achieved with better accuracy. This paper discusses the need to introduce a national Cell-Based Digital Cadastral Mapping System model (DCMS) that spans from the federal level down to the states, local governments and the private enterprises such as estate surveying firms. That is, from geodetic accuracy to tertiary (micro) accuracy in order to achieve a seamless nationwide digital cadastre coverage. At the micro level of creating DCMS, Goshen Beach Estate in Lekki Peninsula was used as a case study. The use of Unique Parcel Identifier (UPI) and Spatial Indexing were discussed. Quasi-Land analysis was carried out. From this study, it was discovered that productivity and delivery of land information are enhanced; opportunity of multiple users guides against data and resources duplication; and legal, technical (organizational and technological) and financial issues are better tracked and tackled using DCMS.
  • Item
    Open Access
    Tidal Charateristics and Sounding Datum Variation in Lagos State
    (2014-07) Badejo, O.T.; Olaleye, J.B.; Alademomi, A.S.
    The need for water level monitoring has increased over the years. Water level monitoring is among other things useful for oil and gas exploration and exploitation activities, and construction of ports and harbour works. The mean sea level for Lagos, Nigeria is referenced to the Lagos datum situated at the Office of the Surveyor General of the Federation at Lagos Island. This paper examines correlation and variation in the mean water levels and sounding datums for twelve water bodies in Lagos State. Water level observations were taken with the aid of tide gauges for twenty nine days at 12 tidal stations strategically situated within Lagos State. The mean water levels and other tidal characteristics for the various water bodies were calculated from the observed tidal observations from the twelve tide gauge stations. The tide gauge station at the Lagos Harbour has a known chart datum. Sounding datums were therefore determined for the eleven tide gauge locations by sounding datum transfer technique using the Chart datum at the Lagos harbor. The result from our study shows that there are variations in the tidal characteristics of the various water bodies in Lagos State. There is also a need for the harmonization of the various tidal datum in Lagos State.