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 6-10 z 62
... boundary. It is customary to distinguish the following types of polygons (Figure 2.2). • A polygon is simple if its boundary is a simple polyline. • A convex polygon P is such that for any pair of points A and B in P the segment AB is ...
... boundary of a polygon. Tessellation A cellular decomposition of the plane (usually, a grid) serves as a basis for representing the geometry. The partitioning of the embedding space into disjoint cells defines a discrete model, sometimes ...
... boundary description; once the starting vertex has been chosen, there are two ways of scanning the vertices, called clockwise and counterclockwise orders. Second, there is no apparent distinction between a polyline structure 38 CHAPTE ...
... not necessarily connected. Furthermore, they may overlap. Each polyhedron divides the space into its interior, its boundary, and its exterior. *: *T**... ź. ** £ £ .*.*.*. '' 2. U". 42 CHAPTE R2 Representation of Spatial Objects.
... boundary is line L3 containing points (2,2) and (3,0). P is then the geometric union of P and P. To decompose (4,4) (0,2) (6,1) (3,0) Figure 2.12 Building a nonconvex polygon. Figure 2.10 Definition of polygon P. Figure 2.11 Definition ...
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 |