期刊名称：Archiwum Fotogrametrii, Kartografii i Teledetekcji
印刷版ISSN：2083-2214
出版年度：2009
卷号：20
语种：English
出版社：Main Board of Association of Polish Surveyors
摘要：Orthophoto is a relevant component of the GIS database. However it has several drawbacks in urban areas,which can be eliminated when true ortho,based on a precise DigitalSurface Model,is applied. Such DSM takes into account the structure of roofs. The DSM model plays a key role in determining the quality of the final product. The generation of the DSM process consists of a series of technological stages working with different levels of automation. The DSM for very densely built-up areas and the complex structure of roofs usually does not meet the quality requirements when an automatic process is applied. Therefore a true ortho DSM should still be manually prepared if it is to be accurate. Software for true ortho generation usually requires the vector data in DXF format as an input - which does not provide proper control for the roof structures. Using Inpho OrthoMaster software,several criteria have to be fulfilled for the initial data which describe the roof structures. In this paper,the functionality of the computer programs prepared by the authors to adequately describe vector data used during the manual acquisition and editing of the structural lines of the roofs was presented. The task of those programs is to correct existing errors like crossing roof boundaries and combs. The software which has been prepared allows one to analyse and adjust the required geometric criteria and correct the vector description of the types of object required which in the end are entered into the program generating true ortho. Such programs considerably improve the effectiveness of producing DSMs and also accelerate the whole process of true ortho production.
其他摘要：Ortofotomapa cyfrowa jest istotnym składnikiem baz danych GIS. Posiada ona jednak szereg wad w obszarach zabudowanych. Wady te są eliminowane w procesie generowania true-ortho z uwzględnieniem precyzyjnego Numerycznego Modelu Pokrycia Terenu,czyli z uwzgl
关键词：orthophotomap;true-ortho;visibility map;digital surface model (DSM);building extraction
其他关键词：ortofotomapa;true-ortho;martwe pola;NMPT;stereodigitalizacja;obrysy budynków
