Geometric Retrieval for Grid Points in the RAM Model
Дата
Авторы
Sioutas,Spyros
Makris,Christos
Kitsios,Nektarios
Lagogiannis,George
Tsaknakis,John
Tsichlas,Kostas
Vassiliadis,Bill
Journal Title
Journal ISSN
Volume Title
Издатель
Journal of Universal Computer Science
Аннотация
Описание
We consider the problem of d-dimensional searching (d 3) for four query types: range, partial range, exact match and partial match searching. Let N be the number of points, s be the number of keys specified in a partial match and partial range query and t be the number of points retrieved. We present a data structure with worst case time complexities O(t + logd-2 N), O(t + (d - s) + logs N), O(d + ) and O(t + (d - s) + s ) for each of the aforementioned query types respectively. We also present a second, more concrete solution for exact and partial match queries, which achieves the same query time but has different space requirements. The proposed data structures are considered in the RAM model of computation.
Ключевые слова
Multi-Dimensional Data Structures , Indexing , Spatial Data , Grid Model , File Systems