人工編修空載光達資料產製DEM成果之探討

On the Manual Editing for DEM Generation with Airborne LiDAR Data

何心瑜(Hsin-Yu Ho) ； 陳大科(Da-Ko Chen) ； 史天元(Tian-Yuan Shih) ； 徐偉城(Wei-Chen Hsu)

《航測及遙測學刊》 13卷4期 (2008/12) Pp. 231-239

https://doi.org/10.6574/JPRS.2008.13(4).1

摘要

空載光達數據產製數值高程模型(DEM)資料過程中，不同產品等級所需要的產製流程不盡相同。本研究於2007年4~6月間進行，依當時之參考規範草稿，DEM產品可分爲三個等級；當產製Level 2以上的產品時，即需藉由人工編修來確保資料品質。研究中選擇五種不同覆蓋面共10幅1/5000圖幅範圍，探討編修時間、不同覆蓋面和不同編修者等三個不同的人工編修項目產製DEM結果。初步成果顯示，以同一圖幅範圍爲例，不同編修人員所需之編修時間不同，成果亦不盡相同；如矮植被區之空載光達資料編修DEM成果的高程平均差爲8公分，標準差爲25公分。

關鍵字

空載光達 ； 人工編修 ； 過濾

並列摘要

In the process of producing digital elevation model with airborne LiDAR, different procedures are required for products of different specified level. This thesis was written from April to June, 2007. Reference to a draft for specifications and standard operation procedures for airborne LiDAR survey, MOI, DEM products were classified to three levels. When producing products higher than level two, it requires manual editing to assure the correctness. In this study, several issues of manual editing are investigated. Ten map-sheets covering five major land-cover types are selected for the comparison. The area of each map-sheet is about 2.5 km by 2.5 km. Preliminary results show that for the same map-sheets, manual editing by different operators may produce different results and the time required is significantly different. In general, the height difference of the DEMs from two individuals is 8 cm and it gives a standard deviation of 25 cm.

並列關鍵字

airborne LiDAR ； manual editing ； filtering