Experimental data

Experimental replica 2.8

ER2.8

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

Soapstone

Material of the surface modification tool

Various

Quartz

Description of the object

Replica of a soapstone sinker made from the Rennesøy soapstone. It was grinded on a sandstone block and engraved. Engravings were made with quartz and flint tools and with a sandstone piece with sharp edges. Side notches were produced with different tools to allow further comparison.

Description of the tool

Flint blade and microblade, sandstone piece with the sharp edge, quartz blade

Material source

Rennesøy, Rogaland, Norway

Current location

Arkeologisk Museum, Universitetet I Stavanger

Date of the experiment

07.11.2024

Experimental session ID

Experimental object ID

Actor name

Mette Adegeest

Type of surface modification 1

Sawing

Type of surface modification 2

Incising

Type of surface modification 3

Grinding

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

1/19

ISO

200

Exposure

1 s

Image processing software

Adobe Photoshop

3D model creation software

Agisoft Metashape v. 1.8.1.

Capturing strategy

238 digital images in RAW format. 7 rounds of imaging with different object orientations: bottom-up, up-bottom, front side, back side, left side, right side, central widthwise. 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

1,198,494

Length of triangle side

0.039 mm

Referencing accuracy

0.003 mm

Measuring accuracy

0.043 mm