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A Study of Using 3D Laser Scanning Technique for Land Parcel Survey-Building Experiment
|關鍵字:||Cadastral maps;地籍圖;land parcel survey;building state survey;戶地測量;建物現況測量||出版社:||土木工程學系||摘要:||
Cadastral maps and cadastral data can provide an very important basis for the land administration management. The accuracy of cadastral maps is closely related to the rights and interests of citizens. Among cadastral surveys, the land parcel survey undoubtedly plays the most important role. Currently, the land parcel survey is only performed to produce 2-D products. In fact, during building state survey, there are lots of spatial information can be obtained. 2-D cadastral data are not sufficient to meet the needs of modern technology for wide uses in the 3-D field. Therefore, it has been forming an inevitable tendency for the adding of cadastral data into diverse precise 3-D spatial information for more widely uses. Nowadays, the technique of long range 3-D laser scanning has become more matured. So, the join of 3-D Laser Scanning in land parcel survey with its high density and precision scanning will make the traditional cadastral maps to produce a 3-D view and meet the requirement for multifunctional uses.
Abundant 3-D point cloud is collected after the use of 3-D scanner over the study area where the technology was introduced to perform land parcel survey. Those points were processed and analyzed to establish buildings model. The coordinate systems at scanning stations were then transformed into currently published cadastral coordinate system to make a simulative cadastre. Once the result after comparison and analysis between the simulative one and the original published cadastral map is corresponding to the regulations, a 3-D cadastre joined with stereo building model can hopefully be set up for browse to public. The 3-D model of cadastral information displayed on monitor not only clearly identifies the boundary situation but also the possible disputes between land owners and the cases of land parcel survey would decrease.
From this study, it shows: that (1) the largest error was within 4 centimeter for boundary point, which is allowed by to the Regulation for Cadastral Survey. (2) 3-D cadastre can be browsed by the public for the convenience of reading and to build a clear realization over the land in practical situation.
|Appears in Collections:||土木工程學系所|
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