Scientific Research Methods in Geography Chapter 10 Feb 9, 2010.

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Presentation transcript:

Scientific Research Methods in Geography Chapter 10 Feb 9, 2010

Data Display… … is a Graphical Technique for communication and analysis that depicts data patterns rather than literally describing them. … allows relevant properties of phenomena to be highlighted and clarified. … is used by scientists for several purposes including: Initial data examination Interpret the meaning of data Communicate data and meaning to others.

Guidelines for Designing Displays Guiding principles for the design and use of data displays boil down to one underlying idea: Effective Communication. Effective Communication means - Communicating a great deal of truthful and relevant information in a manner that is: Clear Accurate Unambiguous Efficient Aesthetically Pleasing

Tables Organized lists, arrays, or matrices of data. Show data values directly with numbers. Only minimal use of spatiality. Tables Depict Data in Two Ways: Distribution Tables Show Frequency Relative frequency, cumulative frequency Contingency tables Descriptive Index Tables Shows tendency, variability, relationship

Tables continued Metric-level data in tables Grouped into classes or intervals to efficiently communicate the pattern of the data. “Class Intervals” How many classes are appropriate: At least 3 or 4 and probably no more than 10 Specific to the data set and what is intended to be communicated

Graphs Pictorial representations of data. The use of spatial properties such as: Location Size Distance Direction 3 Dictums to follow from table 10.1: Label Clearly and Sufficiently Avoid Uninformative and Content-Free Graphic Marks Fill the Graph Space with Data Marks

What Types of Graphs are These? What are their uses?

Examples of Global Warming Graphs

Maps In this context… maps are graphical displays that depict earth-referenced features and data. “Take at least one Cartography Course” Reference Maps: Depict actual earth surface features as accurately as possible Locations are encoded with a coordinate system Thematic Maps Special purpose displays Hybrid “map-graph” that uses geographic space as a base

Maps always distort the earth’s surface and features. Generalizations need to be made when creating a map. Not all levels of detail can be depicted on a map. Symbology and Color schema are important to consider. Sometimes Distortions are part of the communication. ( (

New Trends in Scientific Visualization Information Visualization is key to exploratory data analysis, especially with large spatially and temporally distributed data sets. Buzzwords: Geo-visualization Spatialization Animations Augmented Reality / Virtual Reality Multisensory display technologies: sonification tactilizations Bottom Line: No matter how “gee whiz” the visualization technique is, it needs to meet the requirements of effectively communicating data.

Class Exercise Think of a Data Display example that you have created or viewed that is particularly effective. What made it effective? Can you reproduce it on the white board?