[GRASS-user] GRASS GIS in Archaeology: how to get a cross section -> r3 volumes

[Lluís Vicens]

Hi Peter,

Thanks for your reply. I will take a look at your example as well as the 
source you pointed out.

Best regards,

Lluís

On 12/11/18 11:30, "Peter Löwe" wrote:
> Lluís,
>
> your cross-sections seem to be comparable to geologic strata: Modelling them as 3D-volumes works well in GRASS. (https://grass.osgeo.org/grass76/manuals/raster3dintro.html)
>
> Examples from a geologic strata-stack on slides 41 and 42:
> https://www.slideshare.net/loewe/fossgis-portland-20143dprintingmidresrelease?qid=1e0d4b36-f2f1-4c19-a46d-af240ad9298a&v=&b=&from_search=2
>
> The data was imported from a vector sources, then converted to raster layers (2.5d) which where then blended together into a r3 volume (slide 47 lists the modules which were used).
>
> best,
> Peter
>
> <peter.loewe at gmx.de>
>
>
>
>>     4. GRASS GIS in Archaeology: how to get a cross section
>>        (Lluís Vicens)
>>
>>
>> --
>> ------------------------------
>>
>> Message: 4
>> Date: Mon, 12 Nov 2018 10:40:09 +0100
>> From: Lluís Vicens <lluis.vicens at udg.edu>
>> To: grass-user at lists.osgeo.org
>> Subject: [GRASS-user] GRASS GIS in Archaeology: how to get a cross
>> 	section
>> Message-ID: <623c6ad2-ca5a-bbba-7d49-2dcd49e6d7be at udg.edu>
>> Content-Type: text/plain; charset="utf-8"; Format="flowed"
>>
>> Hi everyone,
>>
>> Let me share some doubts and concerns regarding to a concrete
>> application of GRASS GIS to archaeology.
>>
>> The point is that I would like to prepare some training exercises for a
>> group of archaeologists, and I'm dealing right now with the problem of
>> how to properly represent stratigraphic sections or cross sections over
>> an excavation site. I mean something like this:
>>
>> stratigraphy
>>
>> For the training exercises, I could own a collection or a series of
>> digital surface models (dsm), relative to every single step or
>> excavation phase on the excavation's site process. In a practical way,
>> that means that every time a stratum is removed, the archaeologists can
>> get a new digital surface model using a drone and a lidar sensor. Then
>> computing the difference between the previous dsm and the current one
>> (and so on, successively), they could obtain a collection of stratum or
>> layers to visualize it in a cross section diagram. I don't know if the
>> problem is enough well explained...
>>
>> I've been reading and searching on the Internet for a while, about GRASS
>> GIS and stratigraphic/cross sections, but I've didn't find any hint
>> neither a clear clue about how to do it. So, the question is, is it
>> possible to get something similar to the previous or the following image
>> using GRASS GIS, as well as combined, with other tools or open source
>> software? Any answer, hint or clue will be really appreciated.
>>
>> model
>>
>>
>> Thanks,
>> Lluís
>>
>> -- 
>> Lluís Vicens
>> Servei de Sistemes d'Informació Geogràfica
>> --
>> Universitat de Girona
>> --
>> Pl. Ferrater Mora 1
>> 17071   Girona
>> Tel +34 972 418 039 (7025 intern)
>> lluis.vicens at udg.edu
>>
>> Lloc web:http://www.sigte.udg.edu
>> Twitter:http://twitter.com/SIGTE_UdG
>>
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-- 
Lluís Vicens
Servei de Sistemes d'Informació Geogràfica
--
Universitat de Girona
--
Pl. Ferrater Mora 1
17071   Girona
Tel +34 972 418 039 (7025 intern)
lluis.vicens at udg.edu

Lloc web: http://www.sigte.udg.edu
Twitter: http://twitter.com/SIGTE_UdG

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