Research On The Layout Optimization Of Urban Park Green Space Based On GIS Technology

Urban park green space is not only an important part of urban ecological system and urban green space system,but also plays an important role in people's daily life.With the continuous improvement of people's quality of life,the rapid and convenient use of urban park green space directly affects the quality of people's life.The traditional urban green space planning method can not accurately reflect the convenience and layout of urban residents' arrival in the park.This study is based on the multi spectral remote sensing image of China's GF-1 in April 2017 and the general map of the land use planning of Nanchang(2001-2020).With the support of geographic information system(GIS)and remote sensing(RS),image correction of satellite remote sensing image and land planning general map is carried out.The vector database of the urban green space in the old city center of Nanchang,such as park greenbelt,park greenbelt entry and exit,urban road,bus line and bus station is established by digitalization.The different spatial analysis methods in ARCGIS are compared and analyzed,and the spatial analysis method which is closer to the fact is determined;According to the principle of accessibility,the space statistics and Analysis on the service scope and service population of urban park green space in the study area;Based on the principle of landscape ecology,the layout of urban green space in the study area is rationalized,and the GIS technology is used to compare and analyze the results before and after the optimization.The results show that the network analysis method in ARCGIS is based on the real urban residents' trip and urban construction,and it can more accurately reflect the spatial distribution of urban parks;Nanchang city in the central area of city parks and residential population distribution is not balanced,the city park green space layout is not balanced,with higher accessibility for the South Regional Area,accessibility of the lower areas of southeast area,eastern area,north area,northwest area and northeast area;By balancing the layout of community parks and associated green spaces,improving road traffic network and urban greenway,we can effectively improve the service level of the whole urban park green space in the old city center of Nanchang.