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Title:      Audio Cartography - Rendered Maps (Visual)
Copyright:  2017 University of Oregon
Author:     M. Brittell
License:    Creative Commons Attribution-Share Alike 2.0 Generic (CC-BY-SA 2.0)

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The image files in this collection represent spatial data patterns in an 8x8 
grid. The images were rendered using a custom R script that relies on 
library functionality (audioCartography-prepare-generateTrials.R; R, sp).  
The visual representations depict spatial data patterns using shades of blue 
(RColorBrewer 1.1-2, R 3.3.1 library) to indicate classed data values within 
square grid cells.  

The rendered vector graphic files were edited (Adobe Illustrator® CS6, v16.0.4) 
to name the layer the same as the file (the word "graphic" and the numeric 
identifier for the data that the graphic represents) and to group objects based
on the class of data in the corresponding grid cell.

These visual graphics illustrate the data.  The filenames consist of the prefix 
"graphic" followed by the numeric identifier of the data set that the file 
contents represent.  

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REFERENCES

Adobe Systems Incorporated and its licensors. (1987-2012) Adobe Illustrator® 
	CS6. http://www.adobe.com.

R Core Team. (2016) R: A language and environment for statistical computing. R 
    Foundation for Statistical Computing, Vienna, Austria. Available: 
    https://www.R-project.org/.

Bivand, R.S., E. Pebesma, V. Gomez-Rubio. (2013) Applied spatial data analysis 
	with R, Second edition. Springer, NY. http://www.asdar-book.org/

Pebesma, E.J., R.S. Bivand. (2005) Classes and methods for spatial data in R. 
	R News 5 (2), https://cran.r-project.org/doc/Rnews/Rnews_2005-2.pdf

Neuwirth, E. (2014) RColorBrewer. Web site:
	https://CRAN.R-project.org/package=RColorBrewer 

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