基于地学信息图谱的土地利用动态变化研究——以山东省龙口市为例

阐述了地学信息图谱的内涵及其概念模式.选择山东省龙口市为例,在遥感和地理信息系统技术支持下,利用2002年数字遥感图像和1996年土地利用图及其自然和社会经济统计数据,建立了龙口市土地利用动态变化信息图谱,并根据图谱从空间和时间两方面分析龙口市土地利用动态演变过程,最后结合马尔科夫模型对其未来的演变趋势进行动态预测.研究表明:自1996年以来,龙口市土地利用发生了大幅度变化,耕地面积减少5 383.48 hm2,园地和建设用地面积各增加33 729.62 hm2和2319.91 hm2;同时土地利用结构发生明显变化,主要表现在耕地和园地之间的转化,耕地和园地向建设用地的转化.预测表明:在未来的几十年内,耕地面积仍将继续减少,建设用地面积还会逐年增加,园地仍为该市的主要用地类型.

Research on Land Use Changes Based on Geo-informatic Tupu——Taking Longkou City of Shandong Province as An Example

The paper expatiate the science conception of Geo-informatic Tupu.Supported by RS and GIS technology,the Geo-information Tupu of land use changes of Longkou City in Shandong Province has been worked out as an example based on remote sensing data in 2002,land-use map in 1996 and its natural and social economic data.Then the paper analyzes the land use dynamic change of Longkou City in both spatial and temporal aspects and predicted the land use development and the variation tendency by using of the model of Markov process.The conclusions may be distinguished as follows:(1) The land use changed greatly in Longkou City.The cultivated land decreased by 5 383.48 hm2,the garden plot increased by 33 729.62 hm2,and the land for housing and other construction purpose increased by 2 319.91 hm2.(2) The land use structure has changed remarkably,18.52% of the area in the region is under the changing progress,major types of which were the conversion between cultivated land and garden plot,and turning cultivated land and garden plot to land for housing and other construction purpose.(3) The prediction showed,the cultivated land will keep on decrease,and the land for housing and other construction purpose also increase year after year.The garden plot maintains the major type of land use in Longkou City in several decades.