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Section 4 Case Study: Virtual Hampson Museum#

4.3 Archival Metadata Example #

One of the digital artifacts, Ark_HM_Headpot, has been selected to show an example project metadata set below.

4.3.1 Acquisitional Metadata

The project level metadata below would be completed once for the entire project.

Project Level MetadataSample Entry
Project NameVirtual Hampson Museum Project
Name of monument, survey area, or objectArk_HM_Headpot
Monument/Object NumberNA
Survey LocationHampson Archeological Museum State Park; Wilson, AR
Survey Date(s) of survey (Month/day/year)6-APR-2008
Survey ConditionsIndoors
Scanner DetailsKonica Minolta VIVID 9i; mm
Company/Operator NameCenter for Advanced Spatial Technologies, Christopher Goodmaster
Control data collected?N
Turntable used?Y
RGB Data CaptureY. The VIVID 9i uses internal RGB capture. A three point lighting system was used to illuminate the object from the top and from both sides; this minimized shadows on the object. Each light in the system had 1-3 white light (5000k) flicker free fluorescent bulbs. The number of bulbs that were used to illuminate each artifact varied depending on ambient light conditions and object color.
Estimated Data Resolution0.35mm
Total Number of Scans in Project18
Archived DatasetsOriginal scans, registered dataset, premesh dataset, Mesh dataset, Decimated mesh dataset
Planimetric map of scan coverage areasN
Additional project notesNA
Images from survey Y. Ark_HM_Headpot_001.jpg, Ark_HM_Headpot_003, Ark_HM_Headpot_004.jpg, Arka_HM_006.jpg, Ark_HM_Headpot_009.jpg, Ark_HM_headpot_010.jpg

The information in the scan level metadata table below would be completed for every scan in the project. This information could easily be created in a spreadsheet using the metadata elements as column headings and a row per scan.

Scan Level MetadataSample Entry
Scan FilenameArk_HM_Headpot_scan1.txt
Scan Transformation MatrixArk_HM_Headpot_scan1_matrix.txt
Name of monument/object areaArk_HM_Headpot
Survey Date6-APR-2008
Scan Number1 of 18
Number of Points in Scan160909
Additional Scan NotesNA
Scanner TechnologyTriangulation
Data resolution0.37
Lense or FOV DetailsTele lense

4.3.2 Registration Metadata#

Registration MetadataSample Entry
Name of Registered DatasetArk_HM_Headpot_GR.txt
Total number of scans used in Registration/Total number acquired18 of 18
Global Registration Error in units (2 units precision)0.06
Total number of points in final registration3156822

4.3.3 Additional Products Metadata#

Pre-Mesh MetadataSample Entry
Name of Pre-Mesh DatasetArk_HM_Headpot_GRE.txt
Number of points in file995742
Point Deletion SummaryOverlap reduction was computed in Polyworks software. Following overlap reduction, floating data points were also deleted. Data remnants from overlap reduction were also deleted.
Overlap Reduction (Y/N) (optional)Y
Smoothing (Y/N) (optional)N
Subsampling (Y/N) (optional)N
Color Editions (Y/N) (optional)N

Mesh Creation and Editing MetadataSample Entry
Name of Mesh DatasetArk_HM_Headpot.obj
Estimated mesh spacing.8
Holes Filled (Y/N)Y
Smoothing (Y/N)Y
Color Editions (Y/N) (optional)N
Healing/despiking (Y/N) (optional)Y
Total Triangle count (post editing)647169
RGB Color Included (Y/N)Y
Data Reduction (Y/N)N
Coordinate System Adjustment (Y/N)N
Additional processing notes NA

Decimated Mesh MetadataSample Entry
Name of decimated mesh datasetArk_HM_Headpot_25k.obj
Total Original Triangle Count647169
Decimated Triangle Count25000
RGB Color preserved from original datasetY

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