Abstract:
Taking cultivated land in Luoyang city as the research object, the characteristics of cultivated land spatial pattern and its change trend are analyzed from 2009 to 2019 based on GIS with the help of landscape pattern index analysis, kernel density estimation and spatial autocorrelation. Results show that: (1) The city of luoyang in 2009-2019, the cultivated land area decreases first increases, the cultivated land fragmentation has been enhanced, and the cultivated land in the city of luoyang in the dominant position in the landscape of the whole. (2) During the study period most of the outer municipal district in the northeast region and southwest parts of luanchuan county nuclear density is high, the surrounding areas of luanchuan county is relatively sparse. The areas with high and extremely high values of cultivated land kernel density first expanded and then contracted, while the areas with low values expanded from 2014 to 2019. (3) There is a significant spatial autocorrelation of cultivated land in Luoyang, and the autocorrelation increases year by year. In the local spatial autocorrelation analysis, the "high-high" type area is concentrated in the north and northeast of Luoyang, and the "low-low" type area is concentrated in Luanchuan county and Song county as well as the area under the jurisdiction of Luoyang city, which is heavily affected by topography and urbanization. During the study period, the expansion occurred in the district of Luoyang, most of which was transferred from the "high-low" type district.