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KTH /
Samhällsplanering /
Geoinformatik /
Seminarier /
December 17
Semantic Aspects of Spatial
and Temporal Dynamics
Dr. Ola Ahlqvist, Assistant Professor
The Ohio State University
Abstract
Thinking and reasoning about the size, shape, distribution,
and scale of spatio-temporal phenomena is at the heart of
geography. Arguably one of the main premises of geographic knowledge
is the inherent imperfection of geographic information. The application of
computation and visualization to geographic information has matured but so far
failed to recognize data uncertainties such as subjectivity and vagueness often expressed
in terms of imprecise or vague categories. I will present some approaches to represent semantics
and vagueness in geographic data and then look beyond the first obvious benefits of these knowledge structures.
Through examples from studies of land cover, land cover change and urban sprawl I will demonstrate the
interdependence of space-time and conceptual spaces and how this suggest a new realm for proximity, cluster,
and change analysis. This, I will argue, opens a new, intriguing analytical direction
tentatively termed geo-attribute space analysis.
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