Spatial Databases: With Application to GISElsevier, 30. 5. 2001 - Počet stran: 410 Spatial Databases is the first unified, in-depth treatment of special techniques for dealing with spatial data, particularly in the field of geographic information systems (GIS). This book surveys various techniques, such as spatial data models, algorithms, and indexing methods, developed to address specific features of spatial data that are not adequately handled by mainstream DBMS technology. The book also reviews commercial solutions to geographic data handling: ArcInfo, ArcView, and Smallworld GISs; and two extensions to the relational model, PostgreSQL and Oracle Spatial. The authors examine these underlying GIS technologies, assess their strengths and weaknesses, and consider specific uses for which each product is best suited. |
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Výsledky 1-5 z 44
... tuple per country and one column or attribute per property represented in each country (namely, its name, capital, and population). In order to design a relational schema—that is, the set of tables necessary to represent the application ...
... tuple (row) of such a relation. Each column is an attribute. * Attributes that have alphanumeric types (e.g., string and real). * SQL-based querying. Figure 1.10 shows an example for theme Country with schema (attributes) name, capital ...
... tuples to represent spatial information. • Its lack of user friendliness, as one has to manipulate tables of points. • The difficulty in defining new (spatial) types. * The impossibility of expressing geometric computations such as ...
... tuples are denoted by //, lists by ~, and sets by {}. Using this notation, the structure of points, polylines, polygons, and regions can be summarized as follows: • point: /x: real, y real/ * polyline: < point > * polygon : < point > ...
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Obsah
1 | |
29 | |
CHAPTER 3 LOGICAL MODELS AND QUERY LANGUAGES | 69 |
CHAPTER 4 THE CONSTRAINT DATA MODEL | 113 |
CHAPTER 5 COMPUTATIONAL GEOMETRY | 149 |
CHAPTER 6 SPATIAL ACCESS METHODS | 201 |
CHAPTER 7 QUERY PROCESSING | 267 |
CHAPTER 8 COMMERCIAL SYSTEMS | 311 |
BIBLIOGRAPHY | 373 |
INDEX | 395 |
ABOUT THE AUTHORS | 409 |
Další vydání - Zobrazit všechny
Spatial Databases: With Application to GIS Philippe Rigaux,Michel Scholl,Agnès Voisard Omezený náhled - 2002 |