Analysis and Calculating of Comprehensive Urban Vitality Index by Multi-Source Temporal-Spatial Big Data and EW-TOPSIS

Urban vitality analysis is an important means to measure the attractiveness and cohesion of urban development, which is of great significance to urban operation situation awareness, fine governance and planning design. Taking China Singapore Tianjin Eco-city as the research area, based on multisource temporal-spatial data from January 2020 to February 2021 provided by the smart city data aggregation platform, such as the data of urban transportation, catering waste recycling volume, books borrowed and returned, this paper analyzed the urban vitality index from five aspects of society, transportation, commerce, culture-education and tourism. After spatializing data into geographic grids, method EW-TOPSIS (Entropy Weighted Technique for Order Preference by Similarity to an Ideal Solution) has been utilized to calculate the comprehensive vitality index. The results showed that: from temporal perspective, the vitality of each index was significantly different due to the impact of Corona Virus Disease 2019(COVID-I9) and seasons; the comprehensive vitality decreased sharply to the lowest at the beginning of the COVID-19 while it increased rapidly and then stabilized after the weakening of the prevention and control policies; the comprehensive vitality value of Eco-city reached the peak of the whole year during the National Day Golden Week affected by tourism vitality. From spatial perspective, the distribution of Eco-city vitality level is unbalanced, showing a trend of outward diffusion centered on the urban starting area and the main tourist attractions.