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 53
... polygon is represented by the finite set of its vertices. ENTITY-BASED DATA IN VECTOR MODE There exists a large number of variants to represent polylines and regions in a vector mode. The following is a simple representation. • A ...
... polygon structure. It is up to the software that manipulates geometric data ... simple, in that the foregoing data structure does not prevent two ... polygon can be contained in another, and two polygons can be adjacent, overlapping, or ...
... simple polyline. • Finally, L3 is not a polyline according to our (somewhat restrictive) definition, in that vertex ... polygon is described by a list of vertices. The region consisting of the single polygon P is described by the ...
... simple polygon from a non-simple one, a convex polygon from a nonconvex one, a polygon from a polyline, or a set of adjacent polygons from a set of disjoint or intersecting polygons. FIELD-BASED DATA IN VECTOR MODE We now informally ...
... convex polygon with n edges (n vertices) is defined as the intersection of n half-planes delimited by lines. A region is then a union of convex polygons. This definition enables the definition of non-simple polygons, regions with holes ...
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 |