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Section 4 Case Study: Virtual Hampson Museum#

4.3 Archival Metadata Example #

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

4.3.1 Acquisitional Metadata

Project Level MetadataSample Entry
Project NameVirtual Hampson Museum Project
Name of monument, survey area, or objectArk_HM_Headpot
Monument or object number (if known)NA
Location of SurveyHampson Archeological Museum State Park; Wilson, AR
Date(s) of survey (Month/day/year)4/6/2008
Environmental Conditions/WeatherIndoors
Scan instrument(s); Scan unitsKonica Minolta VIVID 9i; mm
Name of Company, Name of Scan operatorCenter for Advanced Spatial Technologies, Christopher Goodmaster
Control data collected? (Y/N)N
If yes, then provide name of Control point fileNA
Turntable used? (Y/N)Y
RGB Data Capture (Y/N)Y
If Yes then,
-Internal or external?
- Was an additional lighting system used?
- Provide a brief description of the lighting system if applicable
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 resolution across monument/object in units0.35
Total Number of Scans in Project18
Archived DatasetsOriginal scans, registered dataset, premesh dataset, Mesh dataset, Decimated mesh dataset
Planimetric map of scan coverage areas (if applicable) (Y/N)N
If Yes, provide image name.NA
Additional project notesNA
Images from survey (optional) (Y/N)Y
If yes, provide Image Names.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

Scan Level MetadataSample Entry
Name of scanArk_HM_Headpot_scan1.txt
Name of scan transformation matrice (used in Global Registration)Ark_HM_Headpot_scan1_matrice.txt
Name of monument/object areaArk_HM_Headpot
Date of survey4/6/2008
Number of scan in scan sequence1 of 18
Number of points in scan160909
Additional scan notesNA
Scanner Technology TOF? Phase? Triangulation?Triangulation
What lense/FOV was used?Tele lense
Data resolution0.37

Note - The information in the scan level metadata table above would be completed for every scan in the project.

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
If yes, give percentage of reduction from originalNA
Coordinate System Adjustment (Y/N)N
If yes, provide name of transformation matrice fileNA
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 dataset(Y/N)Y