Assessment of Green Space Accessibility Incorporating Sentiment Analysis:An Improved 2SFCA Method
With the increasing improvement of the living standard of the residents in urban areas and their pursuit of quality of life,urban green spaces have become the main places of leisure and recreation for residents.Under this background,how to fairly evaluate the rationality of the layout of urban green spaces and put forward suggestions for improvement has become an important part of urban transportation and land use planning.Urban green space accessibility is a key indicator for evaluating the layout of urban green spaces.In response to the limitations of assessing attractiveness based solely on urban green space area in the past,this paper takes Suzhou urban area as an example.In addition to calculating accessibility using objective attributes in the traditional framework,the paper delves into social media data to incorporate urban residents'subjective sentiment towards urban green space quality indicators into the consideration scope of attractiveness.Through this innovative integration,the paper improves the Two-Step Floating Catchment Area (2SFCA) method,analyzing in-depth the accessibility of urban residents to urban green spaces and the dynamic changes in accessibility before and after public health emergencies.The improved 2SFCA method,combined with Sentiment Knowledge Enhanced Pre-training (SKEP) model,incorporates residents'emotional evaluations of urban green spaces to measure their subjective attractiveness.Meanwhile,considering the skewness characteristic of area indicators,the paper innovatively proposes the Scale Index (SI) as an objective attractiveness evaluation indicator for urban green spaces,providing more scientific and robust support for urban green space planning.The research findings reveal that during public health emergencies,individuals tend to prefer urban green spaces that offer convenient access,such as community parks.However,as daily life gradually resumes,there is a greater preference for urban green spaces equipped with high-quality facilities,such as specialized parks.Only considering objective area as the attractiveness of urban green space leads to overestimation of the accessibility of large-area and underestimation of small-area urban green space.Moreover,solely based on visitors'subjective quality perception of urban green space may underestimate the accessibility of communities around large urban green spaces.The improved 2SFCA method,considering both visitors'subjective perception and objective attributes of urban green space attractiveness,can more accurately assess urban green space accessibility,broadening the perspective of traditional urban green space accessibility assessment.This method can not only be applied to urban green space planning,but also provides a new idea and computational framework for the accessibility analysis of public service facilities.
urban green spaceaccessibility2SFCAsentiment analysisvisitors'commentsquality assessment indicatorsintegration of subjectivity and objectivity
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