Stereo analysis
AnalyzedVerdict
Genuine stereo pair97%
The two photographs contain the viewpoint difference needed to produce genuine depth.
- Depth spread
- 11px
- The range of horizontal difference between the two views. More spread generally means more depth; 0–1 px usually indicates a monoview.
- Match
- 92%
- The share of usable picture detail that can be matched between the left and right views. A higher number means a more reliable comparison.
- Vertical
- 2px
- Vertical drift between matched details. Lower is better; 4 px or more can indicate camera movement, scan skew, or poor alignment.
Two cannon on wheeled carriages stand on a plank platform above the waterfront, their trails extending toward the camera and their spoked wheels casting distinct shadows. Below, buildings follow the curving shore, with piers and small sailing vessels along the water’s edge.
The legible pencil caption on the reverse reads “From Fort Mackinac,” identifying the viewpoint at Fort Mackinac on Mackinac Island, Michigan. The buildings and vessels below are not individually identified.
The yellow mount is printed “NORTHERN MICHIGAN VIEWS.” The reverse bears the imprint of B. D. Jackson, Portrait & Landscape Photographer, 103 Monroe Street, Grand Rapids, Michigan. His advertisement names Mackinac Island and Fort Mackinac among the views offered for sale at Jackson’s Gallery. A separate pencil number at lower right appears to read “1427”; no corresponding number is discernible in the front image, and its function is not established. No date is printed.
Small losses to the yellow mount facing occur chiefly along the right edge and at the lower left corner. There is localized brown staining on the reverse. The photographs are otherwise clean and the card appears sound.
- Title on card
- From Fort Mackinac, (inscribed)
- Medium
- Stereoview
- Subject
- Michigan, Outdoor Scene, Yellow Mount
- Dimensions
- 7.02 × 3.98 in (178.4 × 101.0 mm)
- Condition
- Small losses to the yellow mount facing, chiefly along the right edge and at the lower left corner, with localized brown staining on the reverse. The photographs are otherwise clean and the card appears sound.
- Provenance
- Bears the printed verso imprint of B. D. Jackson, 103 Monroe Street, Grand Rapids, Michigan; no ownership history is supplied.
- Catalogue no.
- MSV1809
Catalogue details
Location
Fort Mackinac, Mackinac Island, Michigan · Mackinac Island, Michigan, United States
Photographed subject · Exact site · 80% confidence
The place is named in the card's own caption or imprint ("Fort Mackinac, Mackinac Island, Michigan"); coordinates resolved by map geocoder (Fort Mackinac, Mackinac Island); building located via Wikipedia article "Fort Mackinac" (https://en.wikipedia.org/wiki/Fort_Mackinac).
Source: Card caption / imprint (direct)
