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标题：Investigation of Revision Techniques for 25k Scaled Topographic Maps
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作者：O.A. Akabali ; E. Uçar ; A. Yilmaz 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXV Part B4
页码：685-688
出版社：Copernicus Publications
摘要：Revision of 25K topographic maps is one of the main duties of General Command of Mapping (GCM). Up to now, revision is carried out by stereo photogrammetric methods using 35K aerial photographs with different compilation systems (analogue and analytic stereo plotters, digital photogrammetric systems and analogue plotters with digital output). Due to technological developments and increasing amount of user requirements about digital vector data, it is vital to have a national geographic database of 25K maps in 2D and 3D. In the classical revision techniques with analogue and analytic stereo plotters; elevation, hydrographical and physiographical features were collected from the previous published maps and the other features were collected completely from the stereo model. But the data collected by this technique are not suitable for the digital vector database. For this reason classical revision techniques were abandoned. From the beginning of 2003, only digital photogrammetric systems have been used for map compilation purpose. Because of the superimposition capability of digital photogrammetric revision technique, elevation data are controlled from the digitized contour data file and the other features are collected completely. Thus, map revision period is increased. Turkey consists of approximately 5500 25K maps. Performing this task with stereo compilation method will take approximately 12 years with the amount of digital photogrammetric systems in Photogrammetry Department, GCM. This period is very long to meet the user demands. The aim of this project is to find an alternative map revision method, which is faster, but as effective and accurate as stereo methods. Four different compilation methods were examined by using two different scaled aerial photographs (25K, 35K). And two 25K topographic maps, which have different feature densities, were used in the project. Advantages and disadvantages of these methods and conclusions of the study are presented in this paper
关键词：Topographic Maps; Stereo Plotters; Revision; Compilation; Digital Vector Data