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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... triangles or administrative and political un1tS. | 17 | 18 || 1 20 || 21 27. 3. Given a set of points P, partitioning into Thiessen polygons associates with each pe P a polygon that is the set of points whose closest point in P is p. The ...
... triangles need to be stored. Each edge points to its endpoints and to its incident triangles (four pointers). Each triangle points to its edges (three pointers). For a detailed description of the structure, the reader is referred to the ...
... triangle), which is defined as the intersection of three half-planes; namely, Hi, H2, and H3. These are delimited by lines L1, L2, and L3. Similarly, Figure 2.11 shows that polygon P, is built using half-planes Há, H5, Hg, and H7. A ...
U této knihy jste dosáhli svého limitního počtu zobrazení..
U této knihy jste dosáhli svého limitního počtu zobrazení..
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 |