Guides to Good Practice
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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 Metadata | Sample Entry |
|---|---|
| Project Name | Virtual Hampson Museum Project |
| Name of monument, survey area, or object | Ark_HM_Headpot |
| Monument/Object Number | NA |
| Survey Location | Hampson Archeological Museum State Park; Wilson, AR |
| Survey Date(s) of survey (Month/day/year) | 6-APR-2008 |
| Survey Conditions | Indoors |
| Scanner Details | Konica Minolta VIVID 9i; mm |
| Company/Operator Name | Center for Advanced Spatial Technologies, Christopher Goodmaster |
| Control data collected? | N |
| Turntable used? | Y |
| RGB Data Capture | Y. 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 | 0.35mm |
| Total Number of Scans in Project | 18 |
| Archived Datasets | Original scans, registered dataset, premesh dataset, Mesh dataset, Decimated mesh dataset |
| Planimetric map of scan coverage areas | N |
| Additional project notes | NA |
| 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 Metadata | Sample Entry |
|---|---|
| Scan Filename | Ark_HM_Headpot_scan1.txt |
| Scan Transformation Matrix | Ark_HM_Headpot_scan1_matrix.txt |
| Name of monument/object area | Ark_HM_Headpot |
| Survey Date | 6-APR-2008 |
| Scan Number | 1 of 18 |
| Number of Points in Scan | 160909 |
| Additional Scan Notes | NA |
| Scanner Technology | Triangulation |
| Data resolution | 0.37 |
| Lense or FOV Details | Tele lense |
4.3.2 Registration Metadata#
| Registration Metadata | Sample Entry |
|---|---|
| Name of Registered Dataset | Ark_HM_Headpot_GR.txt |
| Total number of scans used in Registration/Total number acquired | 18 of 18 |
| Global Registration Error in units (2 units precision) | 0.06 |
| Total number of points in final registration | 3156822 |
4.3.3 Additional Products Metadata#
| Pre-Mesh Metadata | Sample Entry |
|---|---|
| Name of Pre-Mesh Dataset | Ark_HM_Headpot_GRE.txt |
| Number of points in file | 995742 |
| Point Deletion Summary | Overlap 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 Metadata | Sample Entry |
|---|---|
| Name of Mesh Dataset | Ark_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 Metadata | Sample Entry |
|---|---|
| Name of decimated mesh dataset | Ark_HM_Headpot_25k.obj |
| Total Original Triangle Count | 647169 |
| Decimated Triangle Count | 25000 |
| RGB Color preserved from original dataset | Y |