Chaohu Lake is the fifth biggest freshwater lake in China and one of the “Three Rivers and Three Lakes” in the country-wide water air pollution prevention and control plan. The complete cure of Chaohu Lake is a key task in Hefei City. This study takes the ecological surroundings of the Chaohu Lake region as the precedent and selects 21 warning signs from 4 aspects, namely, air quality, meteorological indicators, water resources, and ecological land, and establishes the assessment gadget of ecological surroundings in the Chaohu Lake area. The entropy weight TOPSIS approach and ArcMap10.7 analyze the ecological surroundings, using elements and spatial differentiation traits of every region to act as references for the ecological surroundings, administration, and preservation of the ring Chaohu Lake region. The outcomes of the study are: 1) the basic ecological surroundings of the circum-Chao Lake vicinity (Feidong County, Feixi County, Lujiang County, Baohe District, Chaohu City) used to be negatively impacted all through 2018-2022, declined drastically in 2019, and remained essentially flat in the following period; 2) in the five-year complete comparative analyses of every location in the circum-Chao Lake vicinity, the typical ecological surroundings of Chaohu City and Baohe District was the worst and Lujiang County was the best, followed by Feidong County and Feixi County; 3) through a 12-month evaluation of the ecological surroundings, modifications in the areas around Chaohu Lake from 2018-2022, the ecological surroundings of the Baohe District and Chaohu City suggests an upward trend, and Feixi County indicates a small downward trend in 2022; 4) evaluating the weighting coefficients of every index, the annual common attention of nitrogen dioxide (C3), annual common attention of sulfur dioxide, common annual awareness (C4), common annual temperature (C9), and irrigated vicinity of arable land (C14) are the 4 main factors having an impact on the ecological environment.

The general population’s assessment and perception of a city can be influenced by its skyline, which is one of its representatives. This paper uses semantic segmentation and exploratory factor analysis to conduct a study from two different perspectives, aiming to analyse the development and current situation of the skyline of Hefei’s political and cultural new district. By collecting pictures of the skyline of the New Administrative and Cultural District, the New Administrative and Cultural District of Hefei’s skyline is being studied for overall changes using the semantic segmentation method, and to evaluate the quality of the skyline in various years, the entropy weight–TOPSIS is employed. Through the literature investigation and creation status of the new political and cultural district, the index system is scientifically formulated to conduct a questionnaire survey, and its reliability and validity are tested. This study is conducted with exploratory factor analysis of factors that are vital in the city skyline. The results of this study show that (1) after the semantic segmentation of the pictures, it is found that the proportion of buildings and the proportion of vegetation are both rising; the proportion of buildings tends to level off after 2018, and the proportion of vegetation shows a uniform increase. In the relative proximity ranking, the overall trend is increasing, and the skyline is ranked first in 2024. (2) Two variables were identified based on the findings of the exploratory factor analysis: ‘skyline value’ and ‘neighbourhood ecological quality’. The results of this study show that the skyline of Hefei’s New Administrative and Cultural District in 2024 is the best overall, and that the skyline of the New Administrative and Cultural District has developed into one of the city images of Hefei, and that its optimisation can be considered in terms of the “quality of the surrounding ecological environment”.