Results 21 to 30 of about 24,126 (306)
Efficient processing of reverse nearest neighborhood queries in spatial databases [PDF]
, 2020 This paper presents a novel query for spatial databases, called reverse nearest neighborhood (RNH) query, to discover the neighborhoods that find a query facility as their nearest facility among other facilities in the dataset.
Islam, Md Saiful +4 more
core +1 more source
Spatial Queries for Indoor Location-based Services [PDF]
, 2022 Indoor Location-based Services (LBS) facilitate people in indoor scenarios such as airports, train stations, shopping malls, and office buildings. Indoor spatial queries are the foundation to support indoor LBSs.
Liu, Tiantian; id_orcid
core +1 more source
Modeling and Querying Fuzzy SOLAP-Based Framework
ISPRS International Journal of Geo-Information, 2022 Nowadays, with the rise of sensor technology, the amount of spatial and temporal data is increasing day by day. Modeling data in a structured way and performing effective and efficient complex queries has become more essential than ever.
Sinan Keskin, Adnan Yazıcı
doaj +1 more source
Complex Spatial Query Processing [PDF]
GeoInformatica, 2004 The user of a Geographical Information System is not limited to conventional spatial selections and joins, but may also pose more complicated and descriptive queries. In this paper, we focus on the efficient processing and optimization of complex spatial queries that involve combinations of spatial selections and joins. Our contribution is manifold; we
Mamoulis, N, Papadias, D, Arkoumanis, D
openaire +3 more sources
Path–Based Continuous Spatial Keyword Queries
Complexity, 2022 In this paper, we study the path based continuous spatial keyword queries, which find the answer set continuously when the query point moves on a given path.
Fangshu Chen +5 more
doaj +1 more source
Selectivity Estimation of Complex Spatial Queries [PDF]
, 2001 Several studies have focused on the efficient processing of simple spatial query types such as selections and spatial joins. Little work, however, has been done towards the optimization of queries that process several spatial inputs and combine them ...
Papadias, D +6 more
core +3 more sources
Geo-Social Top-k and Skyline Keyword Queries on Road Networks
Sensors, 2020 The rapid growth of GPS-enabled mobile devices has popularized many location-based applications. Spatial keyword search which finds objects of interest by considering both spatial locations and textual descriptions has become very useful in these ...
Muhammad Attique +5 more
doaj +1 more source
Continuous Nearest Neighbor Queries over Sliding Windows [PDF]
, 2007 —This paper studies continuous monitoring of nearest neighbor (NN) queries over sliding window streams. According to this model, data points continuously stream in the system, and they are considered valid only while they belong to a sliding window that ...
Papadias, Dimitris +3 more
core +1 more source
Spatial models for context-aware indoor navigation systems: A survey [PDF]
, 2012 This paper surveys indoor spatial models developed for research fields ranging from mobile robot mapping, to indoor location-based services (LBS), and most recently to context-aware navigation services applied to indoor environments.
Christophe Claramunt +6 more
core +1 more source
Bounded Conjunctive Queries [PDF]
, 2014 A query Q is said to be effectively bounded if for all datasets D, there exists a subset DQ of D such that Q(D) = Q(DQ), and the size of DQ and time for fetching DQ are independent of the size of D. The need for studying such queries is evident, since it
Yu, Wenyuan +3 more
core +1 more source