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

["Peter Löwe"]

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>
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> 
> 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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