Bio
Chukwuma Okolie is a geospatial professional, data scientist and licensed surveyor with about 13 years of combined experience in academia, the public and non-profit sectors. He has a PhD in Geomatics from the University of Cape Town, and research interests in data fusion, geospatial artificial intelligence, GIScience, environmental modeling and climate change.
He is also an Associate Fellow of the Higher Education Academy (UK). Presently, Chukwuma is a data advisor with the AMALI Data Programme at the African Centre for Cities (ACC), University of Cape Town. In this role, he provides coaching and technical assistance to African Mayors and their staff on data and performance management. In 2023, Chukwuma was the lead data advisor for the cities of Kitwe and Lusaka in Zambia. In both cities, he facilitated the creation of data inventories, data quality assessments and the launch of data reporting tools, in support of mayoral legacy goals for improved solid waste management (SWM). Chukwuma was recently announced as one of the 50 Geospatial World Rising Stars of 2024.
He is the recipient of several awards including the xyHT ‘40 under 40 Geospatial Leaders’ (2017), and the Space Generation Advisory Council – Space Technology for Earth Applications (SGAC-STEA) project group Member of the Year award (2022). Outside AMALI, Chukwuma has worked as a lecturer in several universities, teaching digital mapping, geographic information systems (GIS), remote sensing, photogrammetry, land surveying, and technical communication. He has also supervised several student research theses. Chukwuma is a team member in the ‘Climate adaptation in the Gulf of Guinea’ research project funded by the Salata Institute for Climate and Sustainability at Harvard University. He is highly published with over 80 papers in peer-reviewed journals, conference proceedings and other media.
PUBLICATIONS
Book Chapters
- Alani, R., Ehiwario, H., Bello, O., Akinrinade, O., Okolie, C.J., Seyinde, D., and Daramola, O.E. (2021). Air quality assessment in Lagos, Nigeria. In Natural and synthetic substances in the environment: A Compendium on policy assessment, insights and implications (Eds: Ayejuyo, O., Isanbor, C., and Abayomi, A). University of Lagos Press, 225 – 250.
- Nwilo, P.C., Badejo, O.T., Okolie, C.J. and Orji, M.J. (2020). Geodetic Infrastructure for the Provision of Appropriate Cadastral Survey Works in Nigeria. In Land and Development in Lagos. Centre for Housing and Sustainable Development, University of Lagos. ISBN 9799799815661, pp 353-380. Ed(s) Akinyele, R.T., Nubi, T.G. and Omirin, M.M.
Journal Articles
- Okolie, C. J., Mills, J. P., Adeleke, A. K., Smit, J. L., Peppa, M. V., Altunel, A. O., & Arungwa, I. D. (2024). Assessment of the global Copernicus, NASADEM, ASTER and AW3D digital elevation models in Central and Southern Africa. Geo-Spatial Information Science, 1–29. https://doi.org/10.1080/10095020.2023.2296010
- Njar, N.G., Iheaturu, C.J., Inyang, U.B., Okolie, C.J., Daramola, O.E., and Orji, M.J. (2024). Dynamics of Land Cover Change in the Anambra River Basin of Nigeria and Implications for Sustainable Land Management. Quaestiones Geographicae [AHEAD OF PRINT] https://sciendo.com/article/10.14746/quageo-2024-0011
- Akpan, A.E., Ben, U.C., Ekwok, S.E., Okolie, C.J., Epuh, E.E., Julzarika, A., Othman, A., and Eldosouky, A.M. (2024). Technical and performance assessments of wind turbines in low wind speed areas using numerical, metaheuristic and remote sensing procedures. Applied Energy Volume 357, 1 March 2024, 122503. https://doi.org/10.1016/j.apenergy.2023.122503
- Alani, R.A., Nwude, D.O., Bello, I.I., Okolie, C.J., and Akinrinade, O.E. (2023). Levels and Health Risks of Heavy Metals and Organochlorine Pesticide Residues in Soil and Drinking Water of Flood-Prone Residential Area of Lagos, Nigeria. Water Air Soil Pollut 234, 783 (2023). https://doi.org/10.1007/s11270-023-06748-0
- Ayodele, E.G., Okolie, C.J., Akinnusi, S. et al. (2023). An assessment of the spatio-temporal dynamics of Landsat-derived aerosol concentration in relation with land cover and road networks in the Lagos megacity. Environ Sci Pollut Res 30, 43279–43299 (2023). https://doi.org/10.1007/s11356-022-25042-w
- Ishola, K.S., Fatoyinbo, A.A., Hamid-Mosaku, A.I., Okolie, C.J., Daramola, O.E., and Lawal, T.O. (2023). Groundwater potential mapping in hard rock terrain using remote sensing, geospatial and aeromagnetic data. Geosystems and Geoenvironment. Volume 2, Issue 1, February 2023, 100107. https://doi.org/10.1016/j.geogeo.2022.100107
- Iheaturu, C.J., Okolie, C.J., Ayodele, E.G., Egogo-Stanley, A., Musa, S. and Ifejika Speranza, C. (2023). Dataset of urban development analysis in a section of Kuje Area Council, Abuja, Nigeria Data in brief 46, 108777. https://doi.org/10.1016/j.dib.2022.108777
- Okolie, C.J., and Smit, J.L. (2022). A systematic review and meta-analysis of Digital elevation model (DEM) fusion: pre-processing, methods and applications. ISPRS Journal of Photogrammetry and Remote Sensing, 188, 1-29. https://doi.org/10.1016/j.isprsjprs.2022.03.016
- Okolie, C.J. and Arungwa, I.D. (2022) Accuracy assessment of ALOS World 3D-30m DEMs using field data from Lagos and Federal Capital Territory, Nigeria, Geocarto International, DOI: 10.1080/10106049.2022.2060320.
- Nwilo, P.C., Okolie, C.J., Onyegbula, J.C. et al. (2022). Positional accuracy assessment of historical Google Earth imagery in Lagos State, Nigeria. Appl Geomat 14, 545–568. https://doi.org/10.1007/s12518-022-00449-9
- Iheaturu, C.J, Okolie, C.J., Ayodele, E.G., Egogo-Stanley, A., Musa, S., and Ifejika Speranza, C. (2022). A simplified Structure-from-Motion photogrammetry approach for urban development analysis. Accepted for publication in Remote Sensing Applications: Society and Environment, Volume 28, November 2022, 100850 https://doi.org/10.1016/j.rsase.2022.100850
- Olayinka-Dosunmu, D.N., Adzandeh, A.E., Hamid-Mosaku, I.A., Okolie, C. J., Nwilo, P.C., and Ogbeta, C.O. (2022). Assessing River Benue flow data for flood mitigation and management in Adamawa Catchment, Nigeria. Scientific African, e01205. https://doi.org/10.1016/j.sciaf.2022.e01205
- Epuh, E.E., Moshood, A.I., Okolie, C.J., Daramola, O.E., Akinnusi, S.A., Arungwa, I.D., Orji, M.J., Olanrewaju, H.O., and Fatoyinbo, A.A. (2022). Integration of satellite gravimetry, multispectral imagery and digital elevation model for investigating crustal deformation in the Niger Delta Basin. Geosystems and Geoenvironment, Article no. 100067. https://doi.org/10.1016/j.geogeo.2022.100067.
- Altunel, A.O., Okolie, C.J., and Kurtipek, A. (2022) Capturing the level of progress in vertical accuracy achieved by ASTER GDEM since the beginning: Turkish and Nigerian examples, Geocarto International, DOI: 10.1080/10106049.2022.2063409
- Alademomi, A.S., Okolie, C.J., Daramola, O.E., Akinnusi, S.A., Adediran, E., Olanrewaju, H.O., Alabi, AO., Salami, T.J., and Odumosu, J. (2022). The interrelationship between LST, NDVI, NDBI, and land cover change in a section of Lagos metropolis, Nigeria. Appl Geomat (2022). https://doi.org/10.1007/s12518-022-00434-2
- Maduako, I., Ebinne, E., Uzodinma, V., Okolie, C.J., and Chiemelu, E. (2022). Computing traffic accident high-risk locations using graph analytics. Spat. Inf. Res. (2022). https://doi.org/10.1007/s41324-022-00448-3
- Nwilo, P.C., Onyegbula, J.C., Okolie, C.J., Daramola, O.E., Abolaji, O.E., and Arungwa I.D. (2022). Influence of land cover, slope, and aspect on the vertical accuracy of SPOT DEM at selected sites in Nigeria. Applied Geomatics,14: 17-31. https://doi.org/10.1007/s12518-021-00404-0
- Fasona, M.J., Okolie, C.J., and Otitoloju, A.A. (2021). Spatial drivers of COVID-19 vulnerability in Nigeria. Pan African Medical Journal. 2021;39:19. DOI: 10.11604/pamj.2021.39.19.25791.
- Obiefuna, J.N., Adeaga, O., Omojola, A., Atagbaza, A., and Okolie, C.J. (2021). Flood risks to urban development on a coastal barrier landscape of Lekki Peninsula in Lagos. Scientific African, Volume 12, July 2021, e00787. https://doi.org/10.1016/j.sciaf.2021.e00787
- Nwilo, P.C., Ogbeta, C., Daramola, O.E., Okolie, C.J., and Orji, M.J. (2021). Soil Erosion Susceptibility Mapping of Imo River Basin Using Modified Geomorphometric Prioritisation Method. Quaestiones Geographicae, 40(3) 143-162. https://doi.org/10.2478/quageo-2021-0029
- Obiefuna, J.N., Okolie, C.J., Atagbaza, A., Nwilo, P.C., and Akindeju, F. (2021). Spatio-temporal land cover dynamics and emerging landscape patterns in western part of Lagos State, Nigeria. Environmental & Socio-economic Studies, 9(3), 53-69. https://doi.org/10.2478/environ-2021-0017
- Omogunloye, O.G., Omar, D.M., Okolie, C.J., Daramola, O.E., and Salami, T.J. (2021). Comparative Accuracy Assessment of the Bowring, Chord and Power Series models for Direct and Indirect Determination of Geodetic Coordinates. South African Journal of Geomatics, Vol 10, No 2 (2021), 101 – 114
- Gbopa, A.O., Ayodele, E.G., Okolie, C.J., Ajayi, A.O., and Iheaturu, C.J. (2021). Unmanned Aerial Vehicles for Three‑dimensional Mapping and Change Detection Analysis. Geomatics and Environmental Engineering, 15(1), 41-61. https://doi.org/10.7494/geom.2021.15.1.41
- Obiefuna J.N., Okolie C.J., Nwilo, P.C., Daramola O.E., and Isiofia L.C. (2021). Potential influence of urban sprawl and changing land surface temperature on outdoor thermal comfort in Lagos State, Nigeria. Quaestiones Geographicae 40(1), 5–23. https://doi.org/10.2478/quageo-2021-0001
- Okolie, C.J., Ayodele, E.G., Mayaki, A.O., and Daramola, O.E. (2020). Assessing the Positional Accuracy and Adequacy of the Nigerian GNSS Reference Network. Asia-Pacific Journal of Science and Technology, 25(4), 12p. https://so01.tci-thaijo.org/index.php/APST/article/view/239563
- Alademomi, A.S., Okolie, C.J., Daramola, O.E., Agboola, R.O., and Salami, T.J. (2020). Assessing the relationship of LST, NDVI and EVI with Land Cover changes in the Lagos Lagoon environment. Quaestiones Geographicae, 39(3), 87-109. https://doi.org/10.2478/quageo-2020-0025
- Nse, O.U., Okolie, C.J. and Nse, V.O. (2020). Dynamics of Land Cover, Land Surface Temperature and NDVI in Uyo Capital City, Nigeria. Scientific African, doi: https://doi.org/10.1016/j.sciaf.2020.e00599.
- Alani, R.A., Ogunmoyela, O.M., Okolie, C.J. and Daramola, O.E. (2020). Geospatial analysis of environmental noise levels in a residential area in Lagos, Nigeria.Noise Mapping, 2020(7), 223–238. https://doi.org/10.1515/noise-2020-0019
- Alademomi, A.S., Okolie, C.J., Ojegbile, B.M., Daramola, O.E., Onyegbula, J.C., Adepo, R.O. and Ademeno, W.O. (2020). Spatial and Statistical Analysis of Environmental Noise Levels in a University Campus. The Journal of Engineering Research, Vol. 17, No. 2, 75-88. DOI:10.24200/tjer.vol17iss2pp75-88.
- Epuh, E. E., Okolie, C. J., Daramola, O. E., Ogunlade, F. S., Oyatayo, F. J., Akinnusi, S. A., and Emmanuel E. I. (2020). An Integrated Lineament Extraction from Satellite Imagery and Gravity Anomaly Maps for Groundwater Exploration in the Gongola Basin. Remote Sensing Applications: Society and Environment. Vol. 20 (2020), 100346, 12p. https://doi.org/10.1016/j.rsase.2020.100346
- Iheaturu, C.J., Ayodele, E.G., and Okolie, C.J. (2020). An Assessment of the Accuracy of Structure-from-Motion (SfM) Photogrammetry for 3D Terrain Mapping. Geomatics Landmanagement and Landscape, 2020, 65–82. http://dx.doi.org/10.15576/GLL/2020.2.65
- Nwilo, P.C., Okolie, C.J., Onyegbula, J.C., Abolaji, O.E., Orji, M.J., Daramola, O.E. and Arungwa, I.D.(2020).Vertical Accuracy Assessment of 20-metre SPOT DEM using Ground Control Points from Lagos and FCT, Nigeria. Journal of Engineering Research. Vol. 25(2): 153-164. http://jer.unilag.edu.ng/index.php/jer/article/view/997
- Ayodele, E.G., Okolie, C.J.,Ezeigbo, C.U.,and Fajemirokun, F.A. (2020).Evaluating the Stability and Adequacy of NIGNET for the Definition of Nigerian Geodetic Reference Frame. Nigerian Journal of Technological Development, Vol. 17(1): 1-12.
- https://njtd.com.ng/index.php/njtd/article/view/375/204
- Nwilo, P.C., Olayinka, D.N., Okolie, C.J., Emmanuel, E.I., Orji, M.J., and Daramola, O.E. (2020). Impacts of land cover changes on desertification in northern Nigeria and implications on the Lake Chad Basin. Journal of Arid Environments, Vol 181, 2020, 104190. https://doi.org/10.1016/j.jaridenv.2020.104190
- Nwilo, P.C., Ayodele, E.G., Okolie, C.J., Orji, M.J., Marve, M.F., Oyelade, E.A., and Daramola, O.E. (2020). An Assessment of Seasonal Variations in the CREF CORS at the University of Lagos. Geomatics, Landmanagement and Landscape No. 1, 2020, 63–77. http://dx.doi.org/10.15576/GLL/2020.1.63
- Nwilo, P. C., Ibe, A. C., Adegoke, J.O., Obiefuna, J.N., Alademomi, A.S., Okolie, C. J., Owoeye, O. O., Nwokocha, J. N., Orji, M.J., Umar, A.A., and Daramola, O.E. (2020). Long-term determination of shoreline changes along the coast of Lagos. Journal of Geomatics. Vol. 14(1): 72-83. https://isgindia.org/volume-14-no-1-april-2020/
- Olayinka, D.N., Aro-Lambo, Y., Adediran, E. and Okolie, C.J. (2020). Remote Detection of Cannabis Plantations in Idanre Forest Reserve, Nigeria using Multispectral Landsat Imagery. FIG Peer Review Journal, 16pps. https://fig.net/resources/proceedings/fig_proceedings/fig2020/papers/ts05e/TS05E_olayinka_aro-lambo_et_al_10314.pdf
- Ayodele E.G., Okolie C.J., and Mayaki O.A. (2019). An Assessment of the Reliability of the NIGNET Data. Nigerian Journal of Environmental Sciences and Technology, Vol 3(1): 18 – 29. ISSN (Print): 2616-051X | ISSN (electronic): 2616-0501. https://doi.org/10.36263/nijest.2019.01.0097
- Nwilo, P.C., Umar, A.A., Adepoju, M.O., Okolie, C.J. (2019). Spatio-Temporal Assessment of Changing Land Surface Temperature and Depleting Water in the Lake Chad Area. South African Journal of Geomatics, Vol. 8(2): 144-159. DOI: 10.4314/sajg.v8i2.3 http://www.sajg.org.za/index.php/sajg/article/view/696/361
Conference Proceedings
- Okolie, C.J., Mills, J.P., Adeleke, A.K., and Smit, J.L. (2024). Digital elevation model correction in urban areas using extreme gradient boosting, land cover and terrain parameters, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVIII-4/W9-2024, 275–282, https://doi.org/10.5194/isprs-archives-XLVIII-4-W9-2024-275-2024, 2024.
- Okolie, C.J., Mills, J.P, Adeleke, A.K, Smit, J.L, and Maduako, I.D. (2023). The explainability of gradient-boosted decision trees for Digital Elevation Model (DEM) error prediction, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVIII-M-3-2023, 161–168, https://doi.org/10.5194/isprs-archives-XLVIII-M-3-2023-161-2023, 2023.
- Okolie, C.J., Iheaturu, C.J., Ojegbile, B.M., Ndu, C., and Tella, A. (2023). Spatio-Temporal Variability of Air Quality and relationship with Meteorological Parameters in Cape Town, South Africa, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVIII-M-3-2023, 155–160, https://doi.org/10.5194/isprs-archives-XLVIII-M-3-2023-155-2023, 2023.
- Okolie, C.J., Mills, J.P., Adeleke, A.K. & Smit, J.L. (2023). Enhancing the vertical accuracy of Copernicus digital elevation model using tree-based machine learning models. Abstr. Int. Cartogr. Assoc., 6, 193, https://doi.org/10.5194/ica-abs-6-193-2023
- Tella, A., Mustafa, M. R. U., Balogun, A. O., Okolie, C.J., Bello Yamusa, I., and Ibrahim, M. B. (2023). Spatial prediction of flood in Kuala Lumpur city of Malaysia using logistic regression, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVIII-4/W6-2022, 363–369, https://doi.org/10.5194/isprs-archives-XLVIII-4-W6-2022-363-2023, 2023.
- Arungwa, I. D., Okeke, F. I., Moka, E. C., Kalu, I., and Okolie, C.J. (2023). Diagnosing the terrestrial water storage variation over the Nigerian space: the grace perspective, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVIII-4/W6-2022, 33–39, https://doi.org/10.5194/isprs-archives-XLVIII-4-W6-2022-33-2023, 2023.
- Okolie, C.J., Nzeussi Mbouendeu, C., Silwal, A., Mukherjee, S., Arungwa, I.D., Tella, A., Sirorattanakul, K., Mbouendeu, S.L., Johsnon, N., Ligono, L., Nkwunonwo, U., Musa, H., Eric, T.F., Onwubiko, C., Adzandeh, A, Ndongo, B., and Muhire, D. (2022). Evaluation of Flood Susceptibility in Douala Estuary Cameroon using GIS, Remote Sensing and Logistic Regression. Proceedings of the 73rd International Astronautical Congress (IAC), Paris, France, 18-22 September 2022, 10p.
- Muhire, D., Mukherjee, S., Sirorattanakul, K., Nzeussi Mbouendeu, C., Hertel, V., Maduako, I.D., Okolie, C.J., Vargas-Sanabria, D., Stephane, L., Arungwa, I.D., Menon, A., Silwal, A., Novellino, A., Ndongo, A.B., and Romero, M. (2021). Integrating Social Media and Remote Sensing Data for Flood Assessment in Developing Countries: A Case Study in Douala Estuary, Cameroon. Proceedings of the 72nd International Astronautical Congress, Dubai, United Arab Emirates, 14p.
- Okolie, C. J., Mills, J. P., and Smit, J. L. (2022). Fusion of Copernicus and ALOS World 3D DEMs for watershed and stream network delineation, Abstr. Int. Cartogr. Assoc., 5, 142, https://doi.org/10.5194/ica-abs-5-142-2022, 2022.
- Ligono, L. K. and Okolie, C. J. (2022). Integrated Analysis of Mangrove Changes using the Mangrove Vegetation Index and Random Forest Classification in the Gambia, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVI-M-2-2022, 153–157, https://doi.org/10.5194/isprs-archives-XLVI-M-2-2022-153-2022, 2022.
- Olayinka, D. N., Omolaye, K. L., Ilesanmi, A. J., Okolie, C.J., and Arungwa, I. D. (2021). Application of UAV Surveys for evaluating the Productivity Levels of Traditional and Mechanised Farmers in a Customary Land Tenure System, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2021, 617–622, https://doi.org/10.5194/isprs-archives-XLIII-B3-2021-617-2021, 2021.