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. |
Vyhledávání v knize
Výsledky 6-10 z 63
... region. Contour C1, for instance, is represented by the sequence {P2, P1, P3}, although the points are not stored in this order. Similarly, one can define tables for other spatial types, such as lines consisting of points, and regions ...
... region) are handled as base alphanumeric types. * Many other DBMS functions, such as query optimization, are adapted in order to handle geospatial data efficiently. Most relational off-the-shelf DBMSs offer such a spatial extension (see ...
... region of R” that contains the relevant objects. This region is bounded, and for the sake of convenience we assume that it is a sufficiently large rectangle whose edges are parallel to the axes of the coordinate system. We call it the ...
... region (f). (a) (c) * Two-dimensional objects or surfacic objects are mostly used for representing entities with large areas, such as parcels or administrative units. Polygons constitute the main geometric type for such objects. A ...
... region is defined as a set of polygons. Two remarks are noteworthy. First, the choice of geometric types is arbitrary. More precisely, it depends on the future use of the collection of entities. Many factors may influence this choice ...
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 |