Research On Urban Bluespace Features Affecting Public Health Based On Social Media Data

With the launch and promotion of the "Blue Health Research Project",the provision of public health services in the global blue space has become a hot issue in the health field.At the same time,China also established the concept of "great health"with "promoting health as the center" in 2016,and advocated to improve the unsustainable and unhealthy phenomena in cities through environmental renewal.So far,the blue space within China "The implementation has taken on a vital link.Songhua River is one of the seven major rivers in China.Quantitative research on the impact mechanism of blue space planning and design on the public health services of typical cities in the Songhua River Basin is of great significance to fully exert the health benefits of blue space.Therefore,this study takes the blue space of Harbin and Jilin in the Songhua River Basin as the research object,and uses the social media data and facial expression reading as the technical support from the perspective of "Healthy China" to construct the characteristics of blue space for public health.Impact model,and propose blue space optimization design guidelines to improve public health services.First,through the comparison between field surveys and social media data,this article crawled Sina Weibo data based on the principles of typicality,open source,semi-structured and richness.Based on the GPS positioning results of the data,36 were extracted to attract a large number of visitors.Blue space plot for the congregation.Secondly,it introduces the theory of mutual penetration of health promotion theory,emotional geography and environmental behavior,to clarify the quantitative methods of physical health service level and mental health service level,in which the performance of physical health service is the combination of the amount,richness and intensity of public activities.The performance of mental health services is a combination of emotional feedback,potency,and arousal.Screen the data,use the classification method to identify crowd activities,write a program in Python to obtain the Face ++ Api interface to read facial expressions(Facial Expression Recognization),and visualize the quantitative results on the Arc GIS platform..Thirdly,based on the analysis of word frequency and previous research results,the quantitative indicators of blue space characteristics are clearly defined,which are organizational characteristics:accessibility,convenience,penetration rate,easy identification;morphological characteristics: area,shape index,degree of enclosure,Aspect ratio;interface characteristics: shoreline morphology,bank type,hydrophilicity,water system width,and breadth of sight.The spatial syntax Depthmap and Arc GIS were used to quantifythe indicators.Finally,the blue space characteristics and health service performance were analyzed for correlation and mediation effects,and the SPSS platform was used to build a model of the impact of blue space characteristics on the public health of the Songhua River(Harbin,Jilin).The blue space optimization guidelines are proposed at three levels: morphological improvement and interface processing.The research shows that:(1)the sequence of strong and weak effects of blue space attributes on physical health is: convenience = bank type> hydrophilicity>openness> surrounding degree> water width> accessibility,and the first four are highly significant The latter three are low and significant.(2)The sequence of strong and weak effects of blue space attributes on mental health is: convenience = water system width> hydrophilicity = aspect ratio = area> type of barge = openness>shoreline shape> shape index.And the first seven are highly significant,the latter two are low significant.(3)Convenience and openness of space can guide public emotions through the mediation effect of physical activity.When the shape index approaches 1,D / H is between 0.8-2,and the type of bank is natural,stepped and shoreline Slightly curved,when the public can interact with the water,the blue space has a higher level of health services.This study explores the influence mechanism of blue space on public physical and mental health from the planning and layout to the spatial interface.It aims to lay the foundation for improving the blue space health service level,improving the quality of urban blue space,and promoting the development of healthy China through universal data support and scientific technical means.