Urban Agglomeration Niche Measurement and Spatial-temporal Differences – Take the Central Plains Urban Agglomeration as an Example

Studying the niche of urban agglomerations, we can discover that the process of urban agglomeration can also reflect the impact of ecological factors on the development of a city. The analysis of the Central Plains urban agglomeration in this paper shows that the niche breadth of the Central Plains urban agglomerations is increasing. The Zhengzhou City as the central city has driven the formal development trend around the cities significantly. The hot cities are mainly concentrated near the city of Zhengzhou. However, the level of development is uneven, especially in Zhengzhou, Luoyang, and Sanmenxia, where urbanization is higher than in other urban areas of the Central Plains.