Monitoring and assessment of urban growth patterns using spatio-temporal built-up area analysis

Abstract

The identification of spatio-temporal patterns of the urban growth phenomenon has become one of the most significant challenges in monitoring and assessing current and future trends of the urban growth issue. Therefore, spatio-temporal and quantitative techniques should be used hand in hand for a deeper understanding of various aspects of urban growth. The main purpose of this study is to monitor and assess the significant patterns of urban growth in Seremban using a spatio-temporal built-up area analysis. The concentric circles approach was used to measure the compactness and dispersion of built-up area by employing Shannon's Entropy method. The spatial directions approach was also utilised to measure the sustainability and speed of development, while the gradient approach was used to measure urban dynamics by employing landscape matrices. The overall results confirm that urban growth in Seremban is dispersed, unbalanced and unsustainable with a rapid speed of regional development. The main contribution of using existing methods with other methods is to provide several spatial and statistical dimensions that can help researchers, decision makers and local authorities understand the trend of growth and its patterns in order to take the appropriate decisions for future urban planning. For example, Shannon's Entropy findings indicate a high value of dispersion between the years 1990 and 2000 and from 2010 to 2016 with a growth rate of approximately 94 and 14%, respectively. Therefore, these results can help and support decision makers to implement alternative urban forms such as the compactness form to achieve an urban form that is more suitable and sustainable. The results of this study confirm the importance of using spatio-temporal built-up area and quantitative analysis to protect the sustainability of land use, as well as to improve the urban planning system via the effective monitoring and assessment of urban growth trends and patterns.

Exploring Urban Expansion and Socioeconomic Vitality Using NPP-VIIRS Data in Xia-Zhang-Quan, China

“…To analyze the directional characteristics of urban land expansion, this study adopted the irregular grid division method, combining the eight-direction division method and the equally spaced concentric circles division method [46]. The eight-direction division method refers to the fact that the research area is divided into eight quadrants The core zone of the study area is the center, the East-West direction is the horizontal axis, and the North-South direction is the vertical axis.…”

“…Therefore, to compare urban expansion on different temporal and spatial scales, this study chose urban spatial expansion ability to assess urban spatial expansion intensity. In addition, to analyze the directional characteristics of urban land expansion, this study adopted the irregular grid division method combining the eight-direction division method and the equally spaced concentric circles division method [46] to describe the azimuth differentiation pattern of the expansion of construction land, and reveal the spatial characteristics of construction land as a function of distance.…”

A remote sensing and GIS-based analysis of urban sprawl in Soran District, Iraqi Kurdistan

“…The spatial directions approach is carried out according to known geographical trends, either four or eight. Four directions (instead of eight) were selected in this approach to quantitatively and spatially obtain additional details about the studied case for a realistic evaluation that would support planners and decision makers in Soran district create sustainable plans for the future [2]. Tables 3, 4, 5 show the accuracy assessment with overall accuracy, producer's accuracy, user's accuracy, and Kappa coefficient for the classified maps for 1998, 2008, and 2018 [26].…”

“…The results brought out significant urban expansion of the city for the period 1998-2018. Hence, the built-up land has expanded more than threefold during the last 20 years from 4.51 to 14.93 km 2 showing a positive trend over time. However, the barren land is under stress due to population pressure and the associated demand for urban expansion (Table 6 and Fig.…”

“…Urban sprawling refers to the growth of urban areas resulting from uncontrolled, uncoordinated and unplanned growth [29]. In most cities around the world, the urban growth phenomena have become unsustainable in many respects [2]. Moreover, urbanization itself is a common concern throughout the world where people leave rural areas and accumulate in major cities [3].…”