Results 251 to 260 of about 24,126 (306)

KGAP: An RDF knowledge graph of agricultural commodity prices. [PDF]

open access: yesData Brief
Soares FM   +8 more
europepmc   +1 more source

Spatial queries and data models [PDF]

open access: yes, 1993
We present a unified framework for classifying and answering spatial queries relevant to a Geographic Information System. We classify spatial queries into topological, set-theoretic, and metric queries, on the basis of the kind of relationships between the query object and entities in the search space involved. For answering such queries, we propose an
Leila De Floriani   +2 more
openaire   +2 more sources

Spatial‐Scene Similarity Queries

Transactions in GIS, 2008
AbstractAssessing spatial scenes for similarity is difficult from a cognitive and computational perspective. Solutions to spatial‐scene similarity assessments are sensible only if corresponding elements in the compared scenes are identified correctly. This matching process becomes increasingly complex and error‐prone for large spatial scenes as it is ...
Max J Egenhofer
exaly   +2 more sources

Approximate Queries for Spatial Data [PDF]

open access: yes, 2013
Approximation techniques for spatial data traditionally concern data capture and data representation issues. On the other hand, more recently developed approximation techniques refer to the query to be executed and not to data representation as in the the past monolithic Geographic Information Systems and for this reason they are called query-based ...
BELUSSI, Alberto   +2 more
openaire   +4 more sources

Querying spatial patterns

Proceedings of the 13th International Conference on Extending Database Technology, 2010
Spatial data are common in many scientific and commercial domains such as geographical information systems and gene/protein expression profiles. Querying for distribution patterns on such data can discover underlying spatial relationships and suggest avenues for further scientific exploration.
Vishwakarma Singh   +2 more
openaire   +1 more source

Spatial Predictive Queries

2015 16th IEEE International Conference on Mobile Data Management, 2015
In this seminar, we address spatial predictive queries both in Euclidian spaces and over road networks. We provide a definition for various types of spatial predictive queries, describe current research trends, and envision future directions. We present practical application scenarios and emphasize the roadblocks that are holding industry back from the
Abdeltawab M. Hendawi, Mohamed H. Ali
openaire   +1 more source

Learned Index for Spatial Queries

2019 20th IEEE International Conference on Mobile Data Management (MDM), 2019
With the pervasiveness of location-based services (LBS), spatial data processing has received considerable attention in the research of database system management. Among various spatial query techniques, index structures play a key role in data access and query processing.
Haixin Wang 0001   +3 more
openaire   +2 more sources

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