摘要:以 RS 和 GIS 技术为支撑,基于 1990、2000 和 2006 年三期 Landsat TM/ETM 遥感影像和 2012 年沭阳县地图数据,利用监督分类,提取沭阳县城的建成区要素,通过 GIS几何计算计算出研究区的面积和周长数据,结合地学统计方法对研究区进行比较分析;利用扩展速度、扩展强度指数、紧凑度指数作为分析指标,定量分析沭阳县的城镇扩展情况。结果表明:(1)沭阳县总体建成区面积数量扩大了 45.27km2;(2)沭阳县城镇扩展速率保持在10%以上;扩展强度从 1990-2000年阶段的0.032%提升到2006-2012年阶段 0.141%;(3)沭阳县城空间呈向东南方向不断扩展的变化趋势;(4)建成区面积和城市人口数量均呈增长趋势,但城镇紧凑度。本研究结果能够形成对沭阳县更加全面的认识,有利于沭阳县资源的合理配置和人口的适宜分布,为城市的科学规划和可持续发展提供决策支持。 37395 毕业论文关键词:城镇扩展;GIS;扩展强度指数;紧凑度指数;沭阳县
ANALYSIS OF UBAN EXPANSION BASED ON GIS IN Shuyang COUNTY
Abstract:Extracting built-up area’s elements of Shuyang County through the map data of Shuyang in 2012 and Landsat TM/ETM remote sensing images Supported by RS and GIS technology in 1990, 2000 and 2006. By means of supervised classification , calculating the area and perimeter of the researched region by GIS geometry data and combining with geological statistics method, the researched area can be analyzed comparatively;Using the extension velocity, extension strength index and compact index as an indicator analysis, then quantitatively analyzing extension of Shuyang County . The results showed that: (1) Built-up area of Shuyang County has extended by 45.27 km2 in total; (2) Shuyang County keeps extension rate above 10%; Extension strength has increased from 0.032% during the period of 1990 to 2000 to 0.141% from 2006 to 2012 ; (3) The space of Shuyang County showed a trend of constant extension to southeast ; (4) Both Built-up area and urban population have an increasing tendency, but urban distribution is compact. This study can form a more comprehensive understanding of Shuyang County,and it is advantageous for rational allocation of resources, the optimum distribution of population, and providing decision support for the scientific urban planning and sustainable development in Shuyang County.
Key words: urban extension; GIS; Expansion intensity index; Compact index; Shuyang County
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