[R-sig-Geo] How do you produce a output table containing distances between mineral grains at various azimuthal directions?

Sarah Goslee sarah.goslee at gmail.com
Sat Feb 12 23:24:17 CET 2011


Do you have quantitative data, or just images. If the former, seeing an
example of what you have and what you'd like the output to be would
be very helpful. If the latter, a program like ImageJ (free and Open
Source; google for it) might be more what you need.


On Sat, Feb 12, 2011 at 2:57 PM, Michael Stillwagon
<rocknbike.stillwagon at gmail.com> wrote:
> I am using *R* and I am a senior at Western Carolina University and working
> on my senior thesis and the data set in which I have are images of mineral
> thin sections all separated into different groups of grains, magnetite,
> quartz, etc.. either being a vector layer or a raster layer or any other
> image format needed. I am wanting to calculate the distance between each
> grain or the grain spacing, boundary to boundary, *NOT* center to center and
> also have those distances given every 10 degrees on a 0 to 360 degree
> directional scale. Is there any code out there that does this very exact
> method? Or is there another program, ArcGIS 10 or Fragstats, R preferably.
> Thanks,
> -Michael Stillwagon

Sarah Goslee

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