Firearm Identification and Cartridge Comparison using Three Dimensional Photogrammetry to Compare Firing Pin Impressions and Tool Marks.
Author(s): Scott T. Garrold
The use and applicability of multi-image photogrammetry was investigated to identify and compare the tool marks left on fired brass cartridges found in archaeological contexts. The firing marks imprinted on brass handgun and rifle cartridges were used to identify the firearm from which the particular cartridge was chambered and fired. A Nikon DSLR camera and Agisoft Photoscan software were used to create 3D models of cartridge headstamps. For analysis of tool marks, measurements were taken and cross analyzed with other cartridges of the same caliber and provenience. Measurements were compared and deductions made in order to determine which cartridges were fired from the same firearm. Graphic overlays of the cartridge headstamps were combined with measurements and comparison of similarly chambered rounds. A plausible count was extrapolated for how many firearms could be associated with each specific site in the research area.
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Firearm Identification and Cartridge Comparison using Three Dimensional Photogrammetry to Compare Firing Pin Impressions and Tool Marks.. Scott T. Garrold. Presented at Society for Historical Archaeology, Fort Worth, TX. 2017 ( tDAR id: 435595)
min long: -129.199; min lat: 24.495 ; max long: -66.973; max lat: 49.359 ;