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List:       grass-user
Subject:    Re: [GRASS-user] meaning of "geometry"
From:       Markus Metz <markus.metz.giswork () gmail ! com>
Date:       2016-10-25 21:50:09
Message-ID: CAG+h=FFOHKuKM-GyQ68KdwOYEVk5HUa+dGfEMJxYTXb0HsdpbA () mail ! gmail ! com
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On Tue, Oct 25, 2016 at 10:23 PM, Rich Shepard <rshepard@appl-ecosys.com> wrote:
> On Tue, 25 Oct 2016, Dave Roberts wrote:
>
>> But here again is the confusion. The position of objects relative to each
>> other is independent of the number of layers associated with each object.
>> And so it seems to me that when GRASS users talk about "geometry" they
>> mean space AND layers combined because they are inseparable in the
>> implementation. Perhaps we need a new word for spatial realization and
>> attributes combined rather than geometry.
>
>
> Dave,
>
>   Well, I consider layers to be the third dimension in GRASS vector object
> geometry. They are not independent geometrically if we think of them as
> 'themes,' each mapping objects of the same type, and yet that theme/layer
> has positional relationhips (geometry) with other layer which is usually
> where our interest lies.

I agree, nice description! Thanks, Rich.

Markus M
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