| 基于GIS技术的城镇用地扩展研究——以南京市江宁区为例 |
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| 引用本文： | 曹雪,柯长青,冉江.基于GIS技术的城镇用地扩展研究——以南京市江宁区为例[J].资源科学,2008,30(3):385-391. |
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| 作者姓名： | 曹雪 柯长青 冉江 |
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| 作者单位： | 南京大学地理与海洋科学学院地理信息科学系,南京,210093 |
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| 摘 要： | 本文以1986年、1996年、2002年3期TM／ETM遥感影像为数据源，利用人机交互解译的方法得到研究区3期土地利用现状图。然后采用GIS空间分析技术，对南京市江宁区城镇用地（包括中心城区、建制镇和工矿用地）扩展的时空过程进行了研究。结果表明：16年间城镇用地扩展数量大、速度快，但地区差异较为明显；城镇（中心城区、建制镇）是扩展的主要贡献类型，空间集聚性强，主要围绕着中心城区（原东山镇）以“圈层式”模式向外扩展，长江沿岸地区（如江宁镇）由于拥有良好的岸线资源而成为新的用地增长点；工矿用地扩展空间分异明显，表现为较强的空间离散性，扩展主要集中在研究区的东北部地区，呈显著的“轴向”扩展模式，这主要与交通干线及矿产资源的地理分布位置有关；经济、交通、政策等人文因素是研究区城镇用地扩展的主要驱动因素，而自然环境因素决定了其扩展的宏观趋势和格局。
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| 关 键 词： | 城镇用地 扩展 GIS 遥感 南京 城镇 用地扩展 研究 南京市江宁区 GIS Technology based Land Area Urban Expansion Analyzing City Nanjing District 格局 宏观趋势 环境因素 驱动因素 人文因素 政策 交通干线 |
| 文章编号： | 1007-7588（2008）03-0385-07 |
| 收稿时间： | 2006-09-23 |
| 修稿时间： | 2007-04-12 |
Analyzing Expansion of Urban Land Area based on GIS Technology:A Case Study in Jiangning District of Nanjing City |
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| CAO Xue,KE Chang-qing and RAN Jiang.Analyzing Expansion of Urban Land Area based on GIS Technology:A Case Study in Jiangning District of Nanjing City[J].Resources Science,2008,30(3):385-391. |
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| Authors: | CAO Xue KE Chang-qing and RAN Jiang |
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| Abstract: | Based on the Landsat TM/ETM images of Nanjing in 1986, 1996 and 2002, as well as actual land use maps, the dynamic changes of urban land use in Jiangning District of Nanjing City were analyzed. Some analytical indexes such as transfer matrix, growth intensity index and Fractal dimensions were introduced to describe the spatial differentiation of urban land expansion. The research shows that there is a rapid growth of urban land use while significant differences in land use among regions exist during the past 16 years. The expanded area in the study area was 2666.79 hectare during period of 1986 to 1996, and 8501.22 hectare from 1996 to 2002. The growth intensity index also was 0.11 during period of 1986 to 1996, and 0.74 during period of 1996 to 2002. In central city, the growth intensity index was 5.57 during the period of 1996 to 2002. The growth has been transforming along the Tangshan-Jiangning- Tongjing road from northeast to southwest. Although all towns have been expanding quickly, the differences of urban expansion among towns is obvious. Centers of growth are concentrated on the central city as well as regions adjacent to the Yangtze River. Urban area is the major contributor to the growth of land use. The urban land area expanded with way of gradual spread from the inner to outside and along with the Yangtze River. The spatial differences of industrial land were obvious and the growth mainly happened in the northeast district, presenting a way of axial growth pattern. The manners of urban land expansion have been intensively affected by the geographical location, transportation condition and mining activities. |
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| Keywords: | Urban land use Growth GIS Remote sensing Nanjing Jiangning |
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