Gemini analysis of https://iiif-cloud.princeton.edu/iiif/2/d8%2Fa0%2Fb7%2Fd8a0b714e32f4f099d8cb5c22cb85a0c%2Fintermediate_file/full/8582,/0/default.jpg
Using: https://gist.github.com/ewlarson/9474f690f0d39a9f435cba1eec055b11
{
"text": [
{
"content": "PRINCETON N.J.",
"approx_bbox": [0.75, 0.02, 0.88, 0.06],
"confidence": 0.99,
"role": "title",
"reasoning": "Main geographic identifier located in the standard Sanborn lozenge at the top right."
},
{
"content": "Oct. 1927",
"approx_bbox": [0.76, 0.01, 0.86, 0.03],
"confidence": 0.98,
"role": "subtitle",
"reasoning": "Date of publication/survey located immediately above the city name."
},
{
"content": "7",
"approx_bbox": [0.02, 0.02, 0.05, 0.06],
"confidence": 0.99,
"role": "other",
"reasoning": "Sheet number identifying this specific page within the map series."
},
{
"content": "MADISON",
"approx_bbox": [0.25, 0.09, 0.35, 0.11],
"confidence": 0.97,
"role": "label",
"reasoning": "Street name labeled along the roadway at the top of the map."
},
{
"content": "PARK",
"approx_bbox": [0.57, 0.20, 0.59, 0.25],
"confidence": 0.96,
"role": "label",
"reasoning": "Street name running vertically separating the top blocks."
},
{
"content": "VAN DEVENTER AV.",
"approx_bbox": [0.38, 0.36, 0.58, 0.38],
"confidence": 0.95,
"role": "label",
"reasoning": "Street name labeled horizontally across the center of the map."
},
{
"content": "WIGGINS",
"approx_bbox": [0.08, 0.43, 0.10, 0.49],
"confidence": 0.96,
"role": "label",
"reasoning": "Street name running vertically on the far left."
},
{
"content": "PRINCETON M.E. CHURCH",
"approx_bbox": [0.79, 0.26, 0.87, 0.29],
"confidence": 0.92,
"role": "label",
"reasoning": "Label identifying a specific large building (Methodist Episcopal Church)."
},
{
"content": "N. TULANE",
"approx_bbox": [0.25, 0.59, 0.35, 0.61],
"confidence": 0.97,
"role": "label",
"reasoning": "Street name labeled horizontally."
},
{
"content": "S. TULANE",
"approx_bbox": [0.55, 0.64, 0.65, 0.66],
"confidence": 0.97,
"role": "label",
"reasoning": "Street name labeled horizontally."
},
{
"content": "LINCOLN CT.",
"approx_bbox": [0.63, 0.55, 0.64, 0.60],
"confidence": 0.90,
"role": "label",
"reasoning": "Small street/court name labeled vertically."
},
{
"content": "SPRING",
"approx_bbox": [0.51, 0.64, 0.52, 0.69],
"confidence": 0.96,
"role": "label",
"reasoning": "Street name running vertically in the lower half."
},
{
"content": "NASSAU",
"approx_bbox": [0.92, 0.49, 0.93, 0.55],
"confidence": 0.98,
"role": "label",
"reasoning": "Major street name running vertically along the right edge."
},
{
"content": "WITHERSPOON",
"approx_bbox": [0.45, 0.93, 0.58, 0.95],
"confidence": 0.98,
"role": "label",
"reasoning": "Major street name running horizontally at the bottom."
},
{
"content": "Public Service Gas & Electric Co.",
"approx_bbox": [0.28, 0.77, 0.48, 0.80],
"confidence": 0.95,
"role": "label",
"reasoning": "Label for a large industrial/utility facility."
},
{
"content": "POST OFFICE",
"approx_bbox": [0.85, 0.88, 0.89, 0.90],
"confidence": 0.93,
"role": "label",
"reasoning": "Label for a government building in the bottom right."
},
{
"content": "MOVIES",
"approx_bbox": [0.77, 0.40, 0.81, 0.41],
"confidence": 0.90,
"role": "label",
"reasoning": "Label identifying a theater or cinema."
},
{
"content": "Scale of Feet.",
"approx_bbox": [0.60, 0.93, 0.70, 0.94],
"confidence": 0.99,
"role": "scale",
"reasoning": "Text explicitly identifying the scale bar at the bottom."
},
{
"content": "Map Division PRINCETON UNIVERSITY LIBRARY",
"approx_bbox": [0.89, 0.75, 0.92, 0.85],
"confidence": 0.99,
"role": "other",
"reasoning": "Library stamp indicating provenance (excluded by instructions but highly visible; labeled as other/metadata)."
}
],
"placenames": [
{
"name": "Princeton",
"type": "city",
"source_text_index": 0,
"confidence": 0.99,
"reasoning": "Identified in the main title oval."
},
{
"name": "N.J.",
"type": "state_province",
"source_text_index": 0,
"confidence": 0.99,
"reasoning": "State abbreviation in the title."
},
{
"name": "Madison",
"type": "other",
"source_text_index": 3,
"confidence": 0.95,
"reasoning": "Street name."
},
{
"name": "Park",
"type": "other",
"source_text_index": 4,
"confidence": 0.90,
"reasoning": "Street name."
},
{
"name": "Van Deventer Av.",
"type": "other",
"source_text_index": 5,
"confidence": 0.95,
"reasoning": "Street name."
},
{
"name": "Wiggins",
"type": "other",
"source_text_index": 6,
"confidence": 0.95,
"reasoning": "Street name."
},
{
"name": "Princeton M.E. Church",
"type": "landmark",
"source_text_index": 7,
"confidence": 0.95,
"reasoning": "Named church building."
},
{
"name": "N. Tulane",
"type": "other",
"source_text_index": 8,
"confidence": 0.95,
"reasoning": "Street name."
},
{
"name": "Spring",
"type": "other",
"source_text_index": 11,
"confidence": 0.95,
"reasoning": "Street name."
},
{
"name": "Nassau",
"type": "other",
"source_text_index": 12,
"confidence": 0.99,
"reasoning": "Major historical street name."
},
{
"name": "Witherspoon",
"type": "other",
"source_text_index": 13,
"confidence": 0.99,
"reasoning": "Major street name."
}
],
"map_bbox_estimate": {
"west": -74.663,
"south": 40.349,
"east": -74.658,
"north": 40.353,
"confidence": 0.95,
"method": "inferred_from_placenames",
"reasoning": "Based on the intersection of major streets Witherspoon St, Nassau St, and Van Deventer Ave in Princeton, NJ. The map captures the block directly north of Nassau St along Witherspoon."
},
"description": "A highly detailed Sanborn Fire Insurance Map, Sheet 7, depicting a dense mixed-use neighborhood in Princeton, New Jersey, dated October 1927. The map is oriented with North roughly toward the top-left, following the local street grid. The layout features irregular blocks bounded by Witherspoon Street (bottom), Nassau Street (right), Wiggins Street (left), and Madison Street (top). Detailed building footprints are color-coded to indicate construction material: yellow for wood frame (predominant in residential areas on Tulane and Van Deventer) and pink for brick (common along the commercial corridors of Witherspoon and Nassau). Key landmarks include the 'Princeton M.E. Church' constructed of stone (blue) on Van Deventer, a large 'Public Service Gas & Electric Co.' facility with 'No MFG' noted, and the 'Post Office' at the corner of Witherspoon and Nassau. A 'Movies' theater is visible on Nassau Street. The map includes a compass rose at the top and a scale of feet at the bottom, illustrating the spatial density of this urbanizing historic district.",
"debug": {
"ocr_strategy": "Manual extraction of high-contrast printed text, accounting for rotation (vertical text on side streets) and varying font sizes.",
"placename_extraction_strategy": "Identification of proper nouns associated with linear features (streets) and specific building footprints (landmarks/utilities) distinct from generic descriptors like 'Garage'.",
"bbox_inference_strategy": "Geocoding based on the unique intersection of Witherspoon Street and Nassau Street in Princeton, NJ, identifying the specific quadrant shown.",
"limitations": "Some small lot numbers and minor building usage notes (e.g., 'D', 'S', specific garage capacities) were omitted for brevity to focus on primary geographic structuring elements."
}
}