[R] the volcano orientation

[Michael Sumner]

Does anyone know why 'volcano' is oriented as it is?

image(volcano)  ## filled.contour is the same

I know it's all arbitrary, but north-up is a pretty solid convention. Is
there any reason why the classic 'image()' example data set would not
default to this orientation?

A Google map of the site (in Web Mercator):

https://www.google.com/maps/place/Maungawhau+%2F+Mount+Eden/@-36.8763271,174.7619561,856m/data=!3m1!1e3!4m8!1m2!2m1!1smaungawhau!3m4!1s0x6d0d47db8d7bd1ff:0x8bcffe2a5c7360d2!8m2!3d-36.8666667!4d174.7666667


For image(), the north-up orientation is 't(volcano[,ncol(volcano):1])'.

If you are interested in a roughly georeferenced version I have code here:

https://gist.github.com/mdsumner/20fe3ffa04421bf8e0517c19085e5fd8

(Also see fortunes::fortune("conventions") )

Best, Mike


-- 
Michael Sumner
Software and Database Engineer
Australian Antarctic Division
Hobart, Australia
e-mail: mdsumner using gmail.com

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