Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/63218
Title: Quality assessment and control of topographic data with applications to Hong Kong 1:1,000 i-series digital topo map
Authors: Wong, King Fai
Advisors: Shi, Wenzhong (LSGI)
Keywords: Topographic maps.
Topographic maps -- Data processing.
Issue Date: 2016
Publisher: The Hong Kong Polytechnic University
Abstract: Topographic data depicts natural and artificial features on the earth surface, and is often merged using various data sources in order to reflect the changes of real world entities. The quality of topographic data may affect by many factors, such as uncertainties in source materials, data processing and data usages, etc. Data quality assessment and control are vital in managing topographic data which allows both data providers and users to obtain quality information of their data. To assess the quality of topographic data, a clearly defined procedure is of major significant. This study analyses the principles of spatial data quality and proposes a procedure that includes four steps: a) create data quality objectives, b) establish data quality assessment plan, c) determine data quality result and d) report data quality result, for quality assessment. This procedure presents methods of obtaining internal and external quality requirements and introduces the principles of how to select appropriate methods for quality assessment. In Hong Kong, topographic data is derived from several data sources and receives frequent updates to reflect rapid changes of city and supports town planning, construction and other purposes. To ensure the data fulfilling both internal and external requirements, a robust data quality controlling system is required. This includes the establishment of data policy, data documentation, data quality life control, error handling and data dissemination. This study reviews the topographic data provided by Survey and Mapping Office (SMO) of the Hong Kong Special Administrative Region (HKSAR), and proposed a data quality controlling system that ensures the quality standards are maintained. An experimental study, using the Hong Kong 1:1,000 i-series digital topographic map, is conducted to demonstrate the underlying principles. The significance of this study lies on three aspects: a) to analyze current status of quality assessment and control of topographic data, b) to develop a quality assessment procedure for digital topographic data and c) to enhance the quality controlling system of 1:1,000 Hong Kong i-Series Topo Map.
Description: PolyU Library Call No.: [THS] LG51 .H577M LSGI 2016 Wong
xiv, 158 pages :color illustrations
URI: http://hdl.handle.net/10397/63218
Rights: All rights reserved.
Appears in Collections:Thesis

Files in This Item:
File Description SizeFormat 
b29255855_link.htmFor PolyU Users208 BHTMLView/Open
b29255855_ira.pdfFor All Users (Non-printable)3.49 MBAdobe PDFView/Open
Show full item record
PIRA download icon_1.1View/Download Contents

Page view(s)

166
Last Week
7
Last month
Citations as of Jul 10, 2018

Download(s)

24
Citations as of Jul 10, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.