[GRASS-user] 3D spatial query

[Anna Hodgkinson]

Dear Markus,

Many thanks for your help! 

An r3.what was indeed what I was hoping for. Is there any chance of a command such as this being developed any time soon? It would be very useful!

Thank you very much,

Anna Hodgkinson


----- Original Message -----
From: "Markus Neteler" <neteler at osgeo.org>
To: "Anna Hodgkinson" <anna.hodgkinson at thehumanjourney.net>
Cc: "grass-user" <grass-user at lists.osgeo.org>
Sent: Friday, 8 October, 2010 1:01:45 PM
Subject: Re: [GRASS-user] 3D spatial query

On Thu, Oct 7, 2010 at 2:07 PM, Anna Hodgkinson
<anna.hodgkinson at thehumanjourney.net> wrote:
> Dear list,
>
> I am new to both this list and GRASS< so please bear with me.

Welcome here!

> What I would like to achieve is a 3D "spatial query".
>
> I have a 3D points vector layer (imported from a shapefile) which
> represents archaeological finds data. In addition to this I have
> volume layers (3D rasters) for individual deposits.
> I would like to select and either extract or update the finds data
> according to deposit, but cannot find a command that does this.
>
> I have managed to successfully run v.what.rast - but then realised
> that this only works in 2D.

You would need a new v.what.rast3d module. Perhaps the code of
r3.stats could be helpful for
that in order to see how to obtain voxel info (I thought we had a
r3.what but that's apparently
not the case).

> Any ideas would be greatly appreciated!

Some programming seems to be needed for this.

Markus

> Many thanks and all best,
>
> Anna
>
> -- Anna Kathrin Hodgkinson MA MSt (Oxon) AIFA EES
> Supervisor Geomatics
...

-- 
Anna Kathrin Hodgkinson MA MSt (Oxon) AIFA EES
Supervisor Geomatics

Oxford Archaeology: Exploring the Human Journey
Mobile: +44 (0)7906 638308 (personal)
Switchboard: +44 (0)1524 541 000
http://thehumanjourney.net


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