基于GIS的村级尺度统计数据空间化方法与时序分析初探

Space Method and Timing Analysis of the Village Statistical Data Based on GIS

选择重庆市巴南区石龙镇大连村、大兴村、白马村、金星村、合路村、柏树村、大桥村、大园村和中伦村9个行政村作为研究区,将研究区的遥感影像、数字高程模型、行政界线等数据的空间参考坐标系统一为1980西安坐标系,选择2006-2012年研究区的农用肥施用量数据作为村级尺度统计数据空间化方法研究的研究数据,利用专家打分法对不同土地利用类型与农用肥施用之间的相关性进行打分,分值范围是0-1分。结合村级行政界线、行政村面积、农用肥施用量、土地利用数据和专家打分结果,构建农用肥施用数据空间化模型,分别生成2006-2012年村级农用肥施用数据空间化分布栅格数据,栅格尺度选择1、10、100和200 m这4种,并对栅格化结果进行对比分析。同时,对2006-2012年的农用肥施用空间分布数据进行时序分析,获取农用肥施用量的动态变化趋势。通过研究得到以下结论：①村级农用肥施用量数据空间化尺度与土地利用数据的类型及空间分辨率有关;②研究区各行政村农用肥施用量在2006-2012年期间总体变化趋于平稳。本研究对于实现村级统计数据空间化方法具有一定的参考意义,而空间化后的村级统计数据对于进行村镇区域规划、土地整改、生态环境保护等具有重要指导意义。

D alian village, Daxing village, Baima village, Jingxing village, Helu village, Baishu village, Daqiao village,Dayuan village and Zhonglun village were chosen as research areas. The spatial reference system of the remote sensing images, the digital elevation model and administrative boundaries data were unified to 1980 Xi′ an coordinate system. Score range was 0-1 point. The agricultural fertilizer data space model was constructed through combining with village-level administrative boundaries, area of administrative village, the amount of agricultural fertilizer, land use data and expert scoring results data. As a result, the village agricultural fertilizer distribution data from 2006 to 2012 were generated. Spatial resolutions of 1, 10, 100 and 200 m were selected as raster scales, and the results of grid data were analyzed. The spatial distribution of agricultural fertilizer data from 2006 to 2012 was taken timing analysis, and the changing trends of agricultural fertilizer amount were got. The results showed that： ①Scales of agricultural fertilizer data had relationship with types and spatial resolutions of the land use data. ② The trend of agricultural fertilizer amount in the study area from 2006 to 2012 was smooth. The results of statistical data space of the village had important guiding significance for the village area planning,land rectification, ecological and environmental protection.