JOURN 201 Study Guide - Ephemeris, Ophanim, Umber
30 Oct 2014
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Document Summary
What? where? when? scale, projection, abstraction discrete: point continuous: area smooth: transitional stepped: abrupt. Class 15: geospatial data dimensions & level of measurement. Process of map making = transform environment into geospatial data; involves defining (1) Conceptual model of geospatial data, (2) dimension of data, (3) level of measurement. Nature of geospatial data: discrete versus continuous. Know that transform data from discrete to continuous (e. g. people & population density) Understand difference between smooth and stepped geographic surface identify examples. Dimension of data: point, line, area 3 basic spatial dimensions available to map features. What does each translate to in terms of spatial extent. What is difference between qualitative & quantitative data? (what versus. Identify 4 levels of measurement and describe degree of sophistication associated with each (could you identify examples?) Why do we need cartographic abstraction? (maps are simplifications, issues of scale, Simplification: what you"re going to include (feature elimination, smoothing and aggregation)
