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Lecture

GG 251 Week 9.docx

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Department
Geography
Course
GG251
Professor
Robert Sharpe
Semester
Fall

Description
Cartography Week 9, Lecture 1: Thematic Mapping  Attribute tables hold variables that enable us to map spatial patterns in a layer’s geographic distribution o Resultants maps= thematic/quantities/statistical maps because they use numerical attributes of features **4 Basic Types of Thematic Maps: o Choropleth= graduated colour map o Dot= dot density map o Graduated Symbol o Chart Map Raw data of real world NOT suitable for direct mapping, choosing Thematic Mapping Technique requires careful consideration of numerical properties. 1. Exploration of Attribute Data 2. Levels of Measurement and Symbol Types 3. Data Standardization 4. Matching of Map Type to Spatial Data 5. Data Classification 1. EXPLORATION OF ATTRIBUTE DATA Involves attribute table and understanding it Examine spatial units, variables, distribution, tendency, dispersion, and shape, 2. LEVELS OF MEASUREMENT AND SYMBOL TYPES Level Characteristic Also
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