| Author: | Leung, Kwok-hung |
| Title: | The development in automated map generalization |
| Degree: | M.Sc. |
| Year: | 2000 |
| Subject: | Cartography -- Automation Cartography -- Data processing Digital mapping Hong Kong Polytechnic University -- Dissertations |
| Department: | Multi-disciplinary Studies Department of Land Surveying and Geo-Informatics |
| Pages: | viii, 109 leaves : ill., maps (some col.) ; 31 cm |
| Language: | English |
| Abstract: | Generalization is a key element of cartography. Much research effort has been put on this topic. However, after the work of many decades, no single fully automated generalization system has yet been implemented. Even worse is that the prospect of full automation in generalization of geographic information is still uncertain. Of course, there is no doubt that part of the generalization process can be automated to certain degree. Many researchers reported that their methods or solutions had achieved new success in specific areas of application. This study reviews what have been done so far in automated map generalization and provides an overview on different issues of map generalization. The need for generalization in digital environment is firstly identified, followed by addressing the theoretical concepts so as to provide a background for further discussion. The strength and limitation of major approaches and techniques attempted are also discussed. So far, there is no commercial system that can perform fully automated generalization. The difficulties in developing a generalization system are investigated and those currently available systems are also introduced. The recent increasing use of GIS has brought worries about sources of error in maps, including those caused by generalization effects. This study addresses these quality issues and compares the generalization effects of manual and algorithmic methods. So far, very little has been reported about the development in digital generalization by the local mapping organization, i.e. the Survey and Mapping Office (SMO) of Lands Department. The SMO has completed the conversion of basic maps into digital form, and is now deriving other map products from this map database. This study covers an investigation of current SMO activities and also what SMO has been done in digital map generalization. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b1532056x.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 4.54 MB | Adobe PDF | View/Open |
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