Geographical Data Acquisition
-14 %

Geographical Data Acquisition

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Yong-Qi Chen
433 g
235x155x15 mm
First book on all aspects of acquisition of geographical dataEasy-to-read, semi-technical style
Overview about the theory behind various data acquisition methods
Geographical Data and Its Acquisition (Yuk-Cheung Lee): Introduction; The Nature of Geographical Data; Define the Nature and Scope of the Database; Identify the Types of Features; Design the Geographical Database; A Survey of Data Acquisition Methods; Geo-Reference Data; Trends in Spatial Data Acquisition.- Coordinate Systems and Datum (Esmond Mok, Jason Chao): Coordinate Systems; Geoid and Mean Sea Level; Datum; Ellipsoid; Geodetic and Plane Coordinate Systems.- Transformation of Coordinates between Cartesian Systems (Xiao-Li Ding): Introduction; Basic Concepts of Coordinate Transformations; Models for Coordinate Transformation; Derivation of Transformation Models; Determination of Transformation Parameters.- Map Projections (Yuk-Cheung Lee): Introduction; The Shape of the Earth; Map Projections as Mathematical Transformations; Geometric Distortions on Maps; Preserving Some of the Geometric Properties; Minimizing Geometric Distortions for a Project Area; Naming of Map Projections; Rectangular Grid System; The UTM Projection; The UTM Grid; Integrating Maps of Different Projections; Map Projection and Digital Maps; Conclusions.- Geographical Data from Analogue Maps (Yuk-Cheung Lee, Lilian Pun): Introduction; Vector and Raster Models; The Choice between Vector and Raster Models; Vector Digitizing; Raster Scanning; Conclusion.- Ground-Based Positioning Techniques (Steve Y.W. Lam, Yong-Qi Chen): Introduction; Measurement of Distances and Angles; Measurement of Height; Reduction of Coordinates to Datum; Detail Surveys.- Satellite-Based Positioning (Esmond Mok, Günther Retscher): Concept of Satellite Positioning; Absolute and Relative Positioning; Differential GPS (DGPS) Technique; Positioning Techniques for Surveying; Real-Time Kinematic Positioning; Future Developments.- Techniques for Underwater Data Acquisition (Günther Retscher): Introduction and Overview; Tidal and Other Water Level Changes; Soundings; Survey Preparation and Data Processing; Summary and Outlook onFuture Developments.- Image Acquisition (Bruce King, Kent Lam): Introduction; Image Types; Imaging Devices; Air Borne Imagery; Space Borne Imagery.- Orthoimage Generation and Measurement from Single Images (Zhilin Li): Introduction; The Principles for the Generation of Orthoimages; Measurement from Single Image; Procedure for Geo-Referencing Image and Measured Data; Summary.- Geometric Data from Images (Bruce King): Introduction; Stereoscopic Vision; Stereo Photographs; Height from Stereoscopic Parallax; Planimetric Position from a Stereopair; Analytical Methods; Digital Methodologies.- Thematic Information from Digital Images (Qiming Zhou): Factors to be Considered for Thematic Information Extraction; Feature Identification and Image Interpretation; Image Processing for Thematic Information Extraction; Summary.- Current Trends in Geographical Data Acquisition: An Epilogue (Zhilin Li, Yong-Qi Chen).- References.- Subject Index
This book is dedicated to the theory and methodology of geographical data acquisition, providing comprehensive coverage ranging from the definition of geo-referencing systems, transformation between these systems to the acquisition of geographical data using different methods. Emphasis is placed on conceptual aspects, and the book is written in a semi-technical style to enhance its readability. After reading this book, readers should have a rather good understanding of the nature of spatial data, the accuracy of spatial data, and the theory behind various data acquisition methodologies. This volume is a text book for GIS students in disciplines such as geography, environmental science, urban and town planning, natural resource management, computing and geomatics (surveying and mapping). Furthermore it is an essential reading for both GIS scientists and practitioners who need some background information on the technical aspects of geographical data acquisition.