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基于ShapeFile格式矢量国道、省道和Aster GDEM高程数据,以IDL为开发平台建立了弯道识别算法提取道路弯道;分别评价了云南省16个州(市)境内国道、省道弯道路段危险程度和每条国道、每条省道全线的弯道路段危险程度。对云南省共15 731km的国道、省道进行弯道识别,综合精度达到90%以上。研究结果显示:全省省道线上弯道共1 583处(合并后总数),弯道总长为598km。其中高度危险(C级)464处共219.3km。全省国道线上弯道共761处(合并后总数),弯道总长为277km。其中高度危险210处共101.8km。红河、普洱、版纳境内的省道弯道路段危险等级为极其危险(D级),玉溪境内的国道弯道路段危险等级也为D级。全省16个州(市)50%的国道弯道危险等级为显著危险(B级)。65条省道中,跃片线(S316)等共17条省道弯道路段危险等级为D级。7条国道线弯道路段路况相对较好,弯道路段危险等级在一般危险(A级)~高度危险(C级)之间。研究揭示云南省国道、省道弯道危险路段主要出现在西部地区。
Based on the ShapeFile format vector national highway, provincial highway and Aster GDEM elevation data, a curve recognition algorithm was established based on IDL as a platform to extract the curve of the road. The road sections of national roads and provincial highways in Yunnan Province were evaluated respectively Degree and each national highway, each provincial highway across the curve section of the dangerous degree. A total of 15 731km of Yunnan Province State Road, provincial road bend recognition, the comprehensive accuracy of more than 90%. The results of the study show that there are 1 583 curve corners (the combined total) after the merger, with a total curve length of 598 km. Among them, a total of 219.3km are highly dangerous (Grade C) at 464 locations. The province’s national highway curve on the road a total of 761 (the combined total), the total length of the curve is 277km. Among them, a total of 101.8km are highly dangerous. Honghe, Pu’er, Banna provincial highway corner road dangerous level is extremely dangerous (D level), Yuxi territory of the national road corner dangerous level is also D level. Fifty percent of the nation’s 16 corners of the province (city) have a significant hazard (Grade B) in the cornering curve. Among the 65 provincial highways, Duanxian Line (S316) and a total of 17 provincial road sections with dangerous grade D grade. The road conditions of the curved corners of 7 national highways are relatively good, and the dangerous levels of curved road sections are between general danger (A level) and high danger (C level). The study revealed that the dangerous road sections of national highway and provincial highway in Yunnan Province mainly appear in the western region.