摘要
体现山脉宏观走势和保持山脉线连续性是山脉线提取的难点。文中认为山脉线是由主山脊线片段、山顶点及鞍部点按照一定规则连接而成。先利用栅格DEM低通滤波后提取矢量等高线,再结合DEM提取出山脊线,通过筛选山脊线得到主山脊线来保持山脉宏观走势;再通过主山脊线的二次连接以及将鞍部点、山顶点连接到主山脊线形成连续的山脉线。实验结果表明:这种利用不同类型的数据,地形特征点、线相结合提取山脉线的方法获取的山脉线走势合理、连续性较好,符合人们地貌认知。
To keep the macro trend of the mountain range and the continuity of the mountains lineis the difficult point in the mountains line extraction. This paper holdsthe mountain lineisthe composure of the mainridge line fragments, the peak points and saddle pointsaccording to a certain rules. First it extracts vectorcontour lines afterlow pass filteringbased on raster DEM,then extractsridge lines combined with DEM and vector contour lines. By screeningthe ridge lines, it obtains the main mountain lines in order to keep the macro trend of the maintain range. Secondly, by a secondary connection of main ridge line and a connection of saddle points and peak points to the main ridge line, it achieves the continuous maintain line. The experimental results show that the macro trend of extracted mountain lineis reasonable, its continuity is also tolerable, and mountainaccords with people's landscape cognition using the proposed mountains line extraction method with different data types, which include DEM,vector contour lines and terrain feature points.
出处
《信息通信》
2016年第8期67-70,共4页
Information & Communications
关键词
宏观地形特征
山脉线
主山脊线
多数据模型
macro topography
mountainline
main ridge line
multiple-data model
