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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... (denoted “stored database" in the figure) and the metadata necessary to understand the definition and structure of the database. A DBMS hinges on the fundamental concept of data independence. Users interact with a representation of data ...
... denoted by T.A....Ange,(T) (projection in the relational algebra). Consider this operation and theme of western European countries with their respective names and populations. Each country is a geographic object, and the name of the ...
... denoted by opy (T). Consider the query Name and population of countries of 50 million inhabitants or more. After the selection of the countries whose population is greater than 50 million inhabitants, in Figure 1.4a, we obtain the theme ...
... denoted point query, is the query that retrieves all objects whose geometry contains a given point. • Clipping Clipping extracts the portion of a theme located within a given area (Figure 1.8). As opposed to windowing, the geometry of ...
... denote as x (the abscissa) and y (the ordinate). Although points in the Euclidean plane are quite useful to represent the location and shape of objects of the Earth's surface, it should be underlined that the latter is a globe (hence a ...
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 |