Boots – shoes – and leggings
Patent
1988-11-14
1990-11-06
Chin, Gary
Boots, shoes, and leggings
G06F 704
Patent
active
049691147
ABSTRACT:
Apparatus and method for determining whether a specific spatial relationship exists among physical spatial entities. First, spatially significant descriptors such as the interior and boundary of the physical spatial entities are selected and sets of elements forming a representation of each of the descriptors for each spatial entity is determined. Intersections are then determined between the sets of elements for every combination of descriptors and these intersections are categorized. The categorized relationships are then combined to determine a unique mathematical relationship between the spatial entities. The specific spatial relationship to be analyzed is broken down into the set of desired mathetmatical relationships. According to the present invention, it is then determined whether the unique mathematical relationship between the spatial entities matches any of the desired mathematical relationships used to define the specific relationship, to determine whether or not the spatial entities have the specific relationship.
REFERENCES:
"Spatial Management of Data", Christopher F. Herot, ACM Trans. on Database Systems, vol. 5, No. 4, 12/80, pp. 493-574.
Pullar et al: Toward Formal Definitions of Topological Relations Among Spatial Objects, Report 93.
Spatial Analyst (SPAN) User's Guide, DMAP16630, Oct. 13, 1988, Intergraph.
Herring: TIGRIS: Topologically Integrated Geographic Information System, Proceedings of Eighth International Symposium on Computer-Assisted Cartography.
Herring et al.: Extensions to the SQL Query Language to Support Spatial Analysis in a Topological Data Base, Proceedings of GIS/LIS '88.
Egenhofer: Topological Relationships in Spatial Databases, National Center for Geographic Information and Analysis and Department of Surveying Engineering, University of Maine.
Cooke Gary W.
Herring John R.
Oliver Dianne L.
Chin Gary
Intergraph Corporation
Melnick S. A.
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