Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Earth Science and Enivronmental》 2004-02
Add to Favorite Get Latest Update

Determining cartographic name positional-polyline for area features based on monotonic simplification to polygon

LUO Guang-xiang, MA Zhi-min, CHEN Xiao-ming, LIU Hong-xia, XU Bin, LI An-Qin (School of Earth Sciences and Resources Management,Chang′an University,Xi′an 710054,China)  
Aiming at limitations of the parallel line method which is used to postioning the notations name for area features the paper proposed a method called as removing unmonotonic convex vertex prototype(RUCVP) used for simplifing a polygon,moreover,combining with cartographic name placement rules for area features and taking the figure features of soft polygon and hard polygon into account,it made creative improvements for RUCVP,at last,the author proposed two methods,respectively named as removing immonotonic convex vertex for soft polygon name polyline determination(RUMCVSPNP) and as removing immonotonic convex vertex for hard polygon name polyline determination(RUMCVHPNP).Based on the improved methods among which the most important ideas were four times simplifications to polygon from three rotated positions and two concepts which were the first rotating angle and the second rotating angle ,the article has broken all kinds of limitations of the parallel lines method,constructed the advantage that highly identified the name positional polyline determined for area features by the article method with ones by cartographers,used a simple method but reached effect to resolve a question among a international hard problem-automatic cartographic name placement. A great deal of experiment and analysis in theory have showed that the method is of tightness in mathematical logic, simplicity in implement, universality in utilization, and has guiding significance to automatic name placement of digitally mapping platform.
【Fund】: 国土资源部九五重点攻关项目(960600104)
【CateGory Index】: P283
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved