This readme.txt file was generated on 20160518 by Kevin Dyke

GENERAL INFORMATION
-------------------

1. Title of Dataset: Three-Dimensional Models of Experimentally-Produced Lithic Artifacts Created using an Expedient and Refined Photogrammetry Protocol

2. Permalink:

    http://dx.doi.org/10.13020/D6T88N

3. File Information:  

    Expedient_Setup_Cores.zip
        3D core models made using an expedient photogrammetric setup
       
    Expedient_Setup_Flakes.zip
        3D flake models made using an expedient photogrammetric setup
       
    Refined_Setup_Cores.zip
        3D core models made using a refined photogrammetric setup

    Refined_Setup_Flakes.zip
       3D flake models made using a refined photogrammetric setup
 
Each ZIP file contains models grouped by ID. Each model consists of an OBJ, MTL, and JPEG file.

4. Principal Investigator Contact Information:

   Matthew Magnani
   Harvard University
   matthewmagnani@g.harvard.edu

5. Associate or Co-investigator Contact Information:

   Matthew Douglass
   University of Nebraska-Lincoln
   mdouglass3@unl.edu


6. Associate or Co-investigator Contact Information:

   Samantha T. Porter
   University of Minnesota-Twin Cities
   port0228@umn.edu
   
7. Date of data collection (single date, range, approximate date): 

    2014-10-01 to 2016-05-01

8. Geographic location of data collection (where was data collected?): 

    Objects were knapped from Keokuk chert by M. Magnani at Harvard University in 2014. Data were collected at the University of Minnesota, Twin Cities, and the University of Nebraska, Lincoln


METHODOLOGICAL INFORMATION
--------------------------

1. Description of methods used for collection/generation of data: 

    Source images for all models were captured using a 12.1 megapixel Canon PowerShot SX260 HS compact digital camera. In our expedient protocol, objects were placed on a wire stand. The photographer moved around the object, and captured photos using Auto mode. In our refined protocol, objects were placed on a rotating turntable under controlled lighting conditions. The camera was placed on a tripod. Shutter speed, f-stop, and ISO were set manually. This refined protocol is described in Porter, S. T., Roussel, M., & Soressi, M. (2016). A Simple Photogrammetry Rig for the Reliable Creation of 3D Artifact Models in the Field Lithic Examples from the Early Upper Paleolithic Sequence of Les Cottés (France). Advances in Archaeological Practice, 4(1), 71-86. For more detailed information about about the protocols used to produce the models in this data set, see Magnani, M., Douglass, M., Porter, S. T. (Submitted). Closing the Seams: Resolving Frequently Encountered Issues in Photogrammetric Modelling. Antiquity.

2. Methods for processing the data: 

    All models were processed and scaled in Agisoft PhotoScan Professional Edition. Geomagic Design X was used to center and align models around the origin.


SHARING/ACCESS INFORMATION 

1. Links to publications that cite or use the data:

    Magnani, M., Douglass, M., Porter, S. T. (Submitted). Closing the Seams: Resolving Frequently Encountered Issues in Photogrammetric Modelling. Antiquity.


2. Recommended citation for the data:

    Magnani, Matthew; Douglass, Matthew; Porter, Samantha Thi. (2016). Three-Dimensional Models of Experimentally-Produced Lithic Artifacts Created using an Expedient and Refined Photogrammetry Protocol. Retrieved from the University of Minnesota Digital Conservancy, http://hdl.handle.net/11299/180304.


Credits: Template provided by the University of Minnesota Libraries, http://lib.umn.edu/datamanagement