文章基本信息

标题：ANALYSIS OF 3D MODELLING ACCURACY BASED ON POINT CLOUDS FROM AIRBORNE LASER SCANNING
其他标题：ANALIZA DOKŁADNOŚCI MODELOWANIA 3D BUDYNKÓW W OPARCIU O DANE Z LOTNICZEGO SKANOWANIA LASEROWEGO
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作者：Magdalena Pilarska ; Wojciech Ostrowski ; Krzysztof Bakuła 等
期刊名称：Archiwum Fotogrametrii, Kartografii i Teledetekcji
印刷版ISSN：2083-2214
出版年度：2017
卷号：29
DOI：10.14681/afkit.2017.008
语种：English
出版社：Main Board of Association of Polish Surveyors
摘要：Building modeling for big areas (city and country modeling) is becoming more popular. Building models are generated among all from airborne laser scanning data and aerial images. Additionally,more attention is devoted to analysis of the accuracy of the 3D building models,especially concerning the accuracy of roof planes segmentation and their vertical and horizontal accuracy. In the article analysis which based on the airborne laser scanning point clouds is presented. The methodology,which is described in this article,based on the accuracy analysis proposed within the CAPAP project,which is currently conducted in Poland. In this approach three test areas were chosen. For every roof surface statistical parameters were calculated,i.e. standard deviation of the normal distance between the roof surface and the point cloud,mean distance between the roof surface and the point cloud,and Root Mean Squared Error (RMSE). In order to assess the accuracy of chosen test areas,RMSE threshold equal 1 m was assumed. Additionally,according to in the analysis proposed within the CAPAP project,if 5% of the analyzed building models exceed the assumed accuracy by 20%,the model is not acceptable and should be corrected. For the areas,which were chosen in the article,one of them does not fulfill the assumed accuracy. Additionally,for the first test area,for 1.04% of the roof surfaces the RMSE value exceeds 1 m,for the second test area it was 0.63%,and for the third one: 12.63%. In the second part of the article more detailed analysis for selected buildings was conducted. For roof surfaces histograms,which present the distribution of the normal distances were generated and analyzed. The methodology of building models analysis which based on the histograms makes it possible not only to assess whether the building is generated properly and fulfills the CityGML requirements,but also to say if generalization has been conducted and how big impact does generalization have on the model. The automatic accuracy analysis of the building models can be very helpful in projects which cover big areas. The analysis may indicate buildings,which should be examined in detail. Additionally, accuracy analysis which based on histogram interpretation makes it possible to apply statistical tests in order to assess the if the values distribution is Gauss distribution and to examine whether the generalization during the building modeling was conducted.
其他摘要：Modelowanie budynków w dużej skali (miasto,kraj) jest trendem obserwowanym w wielu krajach. Modele budynków można tworzyć m.in. na podstawie danych z lotniczego skanowania laserowego oraz ze zdjęć lotniczych. Coraz więcej wagi przykłada się również do dok
关键词：building modelling;ALS;CityGML LOD2;accuracy analysis;CAPAP
其他关键词：modelowanie budynków;ALS;CityGML;LOD2;analiza dokładności; CAPAP