ontology of geographic representation
DESCRIPTION
Ontology of Geographic Representation. Kejin Cui Department of Geography University at Buffalo. Introduction. Existed geographic ontology Lack ontology to analyze spatial data models There are no links between geographic entities and spatial data models - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/1.jpg)
Ontology of Geographic Representation
Kejin CuiDepartment of Geography
University at Buffalo
![Page 2: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/2.jpg)
Introduction
• Existed geographic ontology– Lack ontology to analyze spatial data models– There are no links between geographic entities
and spatial data models• Existed research on spatial data models– Lack exploration from perspective of ontology
![Page 3: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/3.jpg)
Overall structure
Data models Geographic entities Geographic events
![Page 4: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/4.jpg)
Field & Object Models
Geo-field: Continuous Geo-object: Discrete
![Page 5: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/5.jpg)
Primitives: Geo-atoms (Goodchild, 2007)
Definition: <x, Z, Z(x)>
![Page 6: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/6.jpg)
Geo-field
![Page 7: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/7.jpg)
6 categories of geo-fields (Goodchild,1993)F1 F2 F3
F4 F5 F6
![Page 8: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/8.jpg)
Geo-object• Four basic elements: Point, Line, Area, Spatio-Temporal_Object• 3 dimensions to describe dynamic geo-objects (Goodchild,2007):
– Movement: Moving VS Stationary– Geometry: Dynamic VS Static – Internal Structure: Evolving VS Rigid
![Page 9: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/9.jpg)
Geo-object
![Page 10: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/10.jpg)
The relationship between geo-field and geo-object
• Object-fields (Cova and Goodchild, 2002)– Mapping each point in a field to an object– Example: Viewshed analysis
• Field-objects (Yuan, 1999)– Representing the internal variation of the property
Z in a geo-object– Example: Hurricane, wildfire
![Page 11: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/11.jpg)
Object fields (Cova and Goodchild, 2002)
![Page 12: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/12.jpg)
Linking geographic entities and data modelsNew object property: is_represented_by
![Page 13: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/13.jpg)
Ontology on representing geographic eventsExample: Hurricane
State Process Event
![Page 14: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/14.jpg)
Future work
• Some more details to be added– 6 categories of geo-fields– Geographic events
• Representing scale effect• Spatial operation with data models
(Occurrent)– Boundary analysis: extracting geo-objects from
geo-fields
![Page 15: Ontology of Geographic Representation](https://reader036.vdocuments.us/reader036/viewer/2022062321/56812f08550346895d94a64c/html5/thumbnails/15.jpg)