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半城市化地区是普遍存在却难以精确量定的空间实体,现有划分方法往往难以兼顾空间要素指标和研究精度的匹配。以乌鲁木齐市高新区为研究区,在Landsat OLI遥感影像数据支持下综合使用3S技术,结合断裂点分析方法,根据用地指标断裂点的空间分布界定出半城市化地区的地域范围。结果表明,乌鲁木齐高新区半城市化地区呈星形发散状分布于老城区和郊区之间;经实地采样验证,上述方法可行,能为半城市化地区的空间界定研究提供新的途径。
Semi-urban areas are ubiquitous but difficult to measure precisely. It is often difficult for the existing methods to take into account the matching between spatial factor indexes and research precision. Based on the Landsat OLI remote sensing image data, the 3S technology is used in combination with the analysis of the fracture points. The spatial distribution of the semi-urban area is defined according to the spatial distribution of the fracture points of the land use index. The results show that the semi-urban areas of Urumqi High-tech Zone are distributed in a star-shaped divergence between the old urban area and the suburbs. Through the field sampling and verification, the above method is feasible and can provide a new way for the spatial definition of semi-urban areas.