Modelling and Analysis of Urban Growth of Idah Metropolis Using GIS Integrated Gradient Technique

Abstract

This thesis aims to better understand changes in the spatial pattern of urban growth and its impact on landscape configuration by conducting a case study in Idah metropolis. The objectives are as follows:

• To model and analyze multi-temporal images (2001, 2010, and 2021) for determining the urban growth in Idah,


• To determine urban development trends using post-classification comparisons,


• Evaluating the degree of urban growth according to urban land cover change over that period

Satellite imagery was employed to distinguish and identify different land surface categories. Integrated remote sensing and GIS (Geographic Information System) technique was used to analyse both qualitative and quantitative perspectives regarding the objectives. The results indicate that the urban area of Idah experienced changes in the various classes. The vegetated area experienced a great change of 49.98%. That is a decrease from the previous year of 2001 to 2010. Also, another 48.67% decrease from 2010 to 2021 is due to the developments in the study area. The built-up area equally decreased by 1.33 % between 2010 and 2021. There was an increase of 12.04% from the year 2001 to 2010.Beach has a drastic increase from 28.10% observed between 2001 and 2010 to 44.50% between 2010. The geographic footprint demonstrates that the distribution of the built-up area was dispersed and continues to grow more dispersed. The significant contribution of this study could benefit many aspects, such as comparative studies between cities or continuous studies relevant to urban growth.