Matches in SemOpenAlex for { <https://semopenalex.org/work/W2492263337> ?p ?o ?g. }
Showing items 1 to 75 of
75
with 100 items per page.
- W2492263337 abstract "This dissertation presents research on spatial data structures and spatial access methods for Geographic Information Systems (GIS). Geographical data types and a variety of data models and data structures that represent the different data types are discussed. A set of requirements and spatial operations on the spatial data structures are also introduced so that the optimal data structures, in terms of both compactness and efficiency in supporting spatial operations, can be selected based on the given data types and required spatial operations. There is no single data structure that is optimal for all types of geographical data, but a possible solution is a multistructured data representation, which employs more than one different data structures to represent different types of geographic data in a single GIS. Based on the idea of multistructured data representation, space efficient quadtrees called Compact Quadtrees (CQT) are first investigated for representing area and surface data types in Knowledge Based Geographic Information System III. These quadtree structures, together with a spatial access method for quadtrees, successfully overcome the problems associated with the pointer based quadtrees. Comprehensive experimental performance evaluations are then conducted on several important Spatial Access Methods (SAM) under a variety of different data sets with different object frequency, object density, object size distribution ratio, as well as object spatial distribution. This performance evaluation provided a guidance for selecting a proper spatial access method for handling line data and point data type in KBGIS. Next, a refined spatial object representation, called Gridded Minimum Bounding Rectangle (GMBR) is developed from the original Minimum Bounding Rectangle (MBR). When applied to R-Tree, this object approximation significantly improves the search performance of R-Tree. Finally, as an application of CQT, a top-down image classification algorithm for quadtree structures is presented. This algorithm, which takes advantage of hierarchical information stored at each level in quadtrees, can substantially reduce the time complexity of the traditional image classification algorithms." @default.
- W2492263337 created "2016-08-23" @default.
- W2492263337 creator A5050594959 @default.
- W2492263337 creator A5059870867 @default.
- W2492263337 date "1990-01-01" @default.
- W2492263337 modified "2023-10-06" @default.
- W2492263337 title "Spatial data structures and spatial access methods for knowledge-based geographic information system iii" @default.
- W2492263337 hasPublicationYear "1990" @default.
- W2492263337 type Work @default.
- W2492263337 sameAs 2492263337 @default.
- W2492263337 citedByCount "1" @default.
- W2492263337 crossrefType "journal-article" @default.
- W2492263337 hasAuthorship W2492263337A5050594959 @default.
- W2492263337 hasAuthorship W2492263337A5059870867 @default.
- W2492263337 hasConcept C11413529 @default.
- W2492263337 hasConcept C124101348 @default.
- W2492263337 hasConcept C138958017 @default.
- W2492263337 hasConcept C151416825 @default.
- W2492263337 hasConcept C153938966 @default.
- W2492263337 hasConcept C154945302 @default.
- W2492263337 hasConcept C159620131 @default.
- W2492263337 hasConcept C162319229 @default.
- W2492263337 hasConcept C199360897 @default.
- W2492263337 hasConcept C203689450 @default.
- W2492263337 hasConcept C205649164 @default.
- W2492263337 hasConcept C2781238097 @default.
- W2492263337 hasConcept C41008148 @default.
- W2492263337 hasConcept C41856607 @default.
- W2492263337 hasConcept C58640448 @default.
- W2492263337 hasConcept C62649853 @default.
- W2492263337 hasConcept C9770341 @default.
- W2492263337 hasConceptScore W2492263337C11413529 @default.
- W2492263337 hasConceptScore W2492263337C124101348 @default.
- W2492263337 hasConceptScore W2492263337C138958017 @default.
- W2492263337 hasConceptScore W2492263337C151416825 @default.
- W2492263337 hasConceptScore W2492263337C153938966 @default.
- W2492263337 hasConceptScore W2492263337C154945302 @default.
- W2492263337 hasConceptScore W2492263337C159620131 @default.
- W2492263337 hasConceptScore W2492263337C162319229 @default.
- W2492263337 hasConceptScore W2492263337C199360897 @default.
- W2492263337 hasConceptScore W2492263337C203689450 @default.
- W2492263337 hasConceptScore W2492263337C205649164 @default.
- W2492263337 hasConceptScore W2492263337C2781238097 @default.
- W2492263337 hasConceptScore W2492263337C41008148 @default.
- W2492263337 hasConceptScore W2492263337C41856607 @default.
- W2492263337 hasConceptScore W2492263337C58640448 @default.
- W2492263337 hasConceptScore W2492263337C62649853 @default.
- W2492263337 hasConceptScore W2492263337C9770341 @default.
- W2492263337 hasLocation W24922633371 @default.
- W2492263337 hasOpenAccess W2492263337 @default.
- W2492263337 hasPrimaryLocation W24922633371 @default.
- W2492263337 hasRelatedWork W1479794690 @default.
- W2492263337 hasRelatedWork W1570296510 @default.
- W2492263337 hasRelatedWork W1964377608 @default.
- W2492263337 hasRelatedWork W1990444355 @default.
- W2492263337 hasRelatedWork W2009382827 @default.
- W2492263337 hasRelatedWork W2028120077 @default.
- W2492263337 hasRelatedWork W2030325309 @default.
- W2492263337 hasRelatedWork W2031123480 @default.
- W2492263337 hasRelatedWork W2032965498 @default.
- W2492263337 hasRelatedWork W2064579165 @default.
- W2492263337 hasRelatedWork W2144422599 @default.
- W2492263337 hasRelatedWork W2349958597 @default.
- W2492263337 hasRelatedWork W2366704042 @default.
- W2492263337 hasRelatedWork W2370513964 @default.
- W2492263337 hasRelatedWork W2379442576 @default.
- W2492263337 hasRelatedWork W2804139585 @default.
- W2492263337 hasRelatedWork W293558235 @default.
- W2492263337 hasRelatedWork W642611422 @default.
- W2492263337 hasRelatedWork W659466076 @default.
- W2492263337 hasRelatedWork W2853259834 @default.
- W2492263337 isParatext "false" @default.
- W2492263337 isRetracted "false" @default.
- W2492263337 magId "2492263337" @default.
- W2492263337 workType "article" @default.