[GRASS-dev] [SoC] GSOC Horizon based stratigraphy wk3 checkin

[Benjamin Ducke]

On 07/05/2013 06:34 PM, Michael Barton wrote:
> How about making the assumption that horizons sampled by a single point
> are horizontal--or perhaps some other plane with dip and strike
> specified by the user like in r.plane.
>

I suppose this is a rather philosophical question.
At least I am not aware of any established method
for answering the question whether a single piece
of evidence should be taken into account or discarded.

I would tend towards the latter (discard). My argument
would be that if a soil horizon occurs only in a
single sample, then either:
(a) the sampling strategy was flawed (perhaps the
spacing between sampling points was too wide) or
(b) there was a problem with interpreting the samples.

If you decide to discard singular evidence, then
your module should display an appropriate warning.

Best,

Ben

> Michael
> ______________________________
> C. Michael Barton
> Director, Center for Social Dynamics & Complexity
> Professor of Anthropology, School of Human Evolution & Social Change
> Arizona State University
> Tempe, AZ  85287-2402
> USA
>
> voice:480-965-6262 (SHESC), 480-965-8130/727-9746 (CSDC)
> fax:          480-965-7671(SHESC), 480-727-0709 (CSDC)
> www: http://csdc.asu.edu, http://shesc.asu.edu
> http://www.public.asu.edu/~cmbarton
>
> On Jul 5, 2013, at 8:57 AM, Tim Bailey <timibly at gmail.com
> <mailto:timibly at gmail.com>>
>   wrote:
>
>> This week I worked on the voxel assignment operator for my module.  I
>> also explored the possibility of using a priori assigned anisotropy
>> with a kernal operator to populate the voxel space.One concern that I
>> am not sure how to manage yet are horizon instances that are only
>> identified in a single sample. Next week I will continue working on
>> these same areas.
>>
>> Tim Bailey
>>
>> Tim  Bailey
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>
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-- 
Dr. Benjamin Ducke, M.A.
{*} Geospatial Consultant
{*} GIS Developer

   benducke at fastmail.fm