Experimental data

Experimental replica 2.16

ER2.16

ID3

LocationNorway

Approximate number of models23

Approximate size132 GB

Experimentally produced objects for the purpose of the TEMPA 3D project. Experiments were held in January and November 2024, and included engraving of soapstone from Rennesøy and Målslev and sandstone from Kamyana Mohyla. Experimentally produced objects were specifically designed to look at the technological traces of the surface modification processes via image-based 3D modeling.

Dataset includes 23 models of the experimentally produced objects. Among other this includes flint and quartz marks on soapstone, sandstone, bone, and antler as well as experimental replicas of Kamyana Mohyla churinga and soapstone line sinkers. For most engravings the modification time was recorded along with the production tool. The accuracy of the models in the dataset are around 0.1 mm, the resolution — around 0.03 mm.

Metadata

Material

Sandstone

Material of the surface modification tool

—

Description of the object

A piece of sandstone from Kamyana Mohyla that underwent direct and inderect percussion to be transformed into a sort of churinga. The sandstone gets crumbly in the random parts of the stone, which makes it complicated to reproduce the desired shape. The fact it is cemented not homogenuously makes it complicated to control the chiseling process. Furthermore, as sand grains crumbe from the sandstone surface, it is hard to spot any technological traces of processing the stone (they all just crumble off). Therefore, the best possible result in creating the 'fish figurine' was the priduction of a sort of a 'belt' that emphasized the fish tail. It would be, however, challenging to interpret this piece as a fish figurine if found in archaeological context

Description of the tool

Granite hammer, flint blade, and sandstone block

Material source

Kamyana Mohyla, Ukraine

Current location

Arkeologisk Museum, Universitetet I Stavanger

Date of the experiment

08.11.2024

Experimental session ID

Experimental object ID

Actor name

Simon Radchenko

Type of surface modification 1

Direct percussion

Type of surface modification 2

Indirect percussion

Type of surface modification 3

Chiseling

Paradata

Data acquisition technique

Image-based 3D modeling

Data acquisition date

21/11/2024

Data acquisition equipment

Canon EOS D5s R, Zeiss Milvus, f/1.4, 50mm, extension ring 12mm, polarizing filter

Focal length

Aperture

1/20

ISO

200

Exposure

2 s

Image processing software

Adobe Photoshop

3D model creation software

Agisoft Metashape v. 1.8.1.

Capturing strategy

173 digital images in RAW format. 6 rounds of imaging with different object orientations: bottom-up, up-bottom, front side, back side, left side, right side. Sharp edges were acquired with additional precision. SfM photogrammetry, static camera within scenes, an artifact on the turntable, black background; scaled from calibrated metric scale bars. Remote shutter release.

Format of supplementary files

*.mtl
*.jpg

File format / 3D model

*.obj

Number of facets

3,178,932

Length of triangle side

0.09 mm

Referencing accuracy

0.026 mm

Measuring accuracy

0.04 mm