Quality evaluation of provincial urban open space system--a case study from Henan Province, China

Urban open space system has played a very important role in social-economic development of provincial region. This paper establishes a quality evaluation system of provincial urban open space system. In this system, the general level is divided into two parts as the secondary level, gray open space and green open space, and also includes eight indexes as the tertiary level. Henan province is the first large province of people in China. According to the construction data of 18 cities in Henan Province from the past six years, we use entropy weight method to determine the weight of each index in the system of each year. We find the weight of green open space has a rising trend, but also the weight of gray open space has a downward trend. In the tertiary level, the weight of density of park in built district grew the fastest, and the weight of road surface area rate in built district fell the fastest. This shows that the construction of park does not keep up with the speed of construction of road in the last eight years of rapid urbanization of Henan China. We use ArcGIS and Geoda to analyze the quality of Henan province urban open space system of spatial classification, spatial differentiation characteristics and spatial correlation. The results show that the characteristic of being temporal and spatial in Henan; besides, a big difference exists between North and South in the space area. There is close relationship between provincial urban open space construction and economic factors. Some suggestions are put forward to promote the urban open space system construction based on the evaluation results. Keywords: Open space system, Entropy weight, ArcGIS, Provincial evaluation