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Efficiency Enhancement of Cadastral Map Rearrangement Using UAS Photogrammetry-Case Study in Yehyu Village, Lanyu Township, Taitung County
|上傳時間: ||2020-12-09 14:45:38 (UTC+8)|
There are many areas in Taiwan that still use graphically digitized cadastral maps, such as mountains or islands. Due to poor precision and environmental changes, the application often has a phenomenon of inconsistency. The cadastral map update has two processes, cadastral map resurveying and rearranging. Currently, it is based on cadastral resurveying. However, due to funding and manpower issues, these areas are still unable to complete the update of the cadastral map.
This study is based on Article 72 of the Rules for the Implementation of Cadastral Survey issued by the Ministry of the Interior of ROC. Cadastral maps in the high mountains or the reefs area can be drawn from basic maps, topographic maps or aerial survey photos. UAS aerial survey was used to obtain the true orthophoto of Yehyu village at Lanyu islands and overlay the original cadastral map be the combination of image map. According to the current situation of the image, the cadastral boundary adjustment and area analysis are carried out. In this way, instead of field measurement, the cadastre finishing work is completed.
From the area analysis data, it is found that the area error is within the specification except that the error of the original registered area has exceeded the error specification and cannot be adjusted.
After the cadastral map and the true orthophoto are nested, Adjusting the boundary line for 170 parcels and recalculating the land area, compare and measure the area measured with the cadastral paper scan and the original registered area. The result shows that the area of the scan number is 8.24% out of the specification limit. Only 2.35% of the area measured in this study exceeds the specification limit, It is proved that it is feasible to assist the cadastral map adjustment through the true orthphoto technique to adjust the cadastral boundary. In addition, the statistics on the increase and decrease of the area before and after the adjustment of the boundary line show that the ratio of area increase is 40.59%, the area reduction is 39.41%, and the area constant is only 20%, indicating the Yehyu village of Lanyu Township, Taitung County. The cadastral map has 80% of the cadastral maps that need to be update.
|Appears in Collections:||[應用空間資訊系(所)] 博碩士論文|
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