Map Librarian / Artist / Teacher focused on user-centered design, informal learning in GLAM, new uses for old maps, collaborative interdisciplinary problem-solving, and the interplay between technology and culture.

Deriving lat/long coordinates from pixel-based text annotations

This vibe-coded app turns MapReader text detections in pixel coordinates into a latitude/longitude table, using the ground control points in an Allmaps Georeference Annotation.

More info and documentation to come on this one, but for now here’s a quick way for you to demo, and a more detailed workflow with screenshots.

Quick Demo:

Open App: Toponym Extractor

Download (right click and save) sample [geojson file with text annotations](assets/P. Famin_Carte_du_Cayor et du_Diambour_1883.geojson

Upload that file in card one, MapReader detections

Paste this Allmaps Georeference Annotation link in card two: https://annotations.allmaps.org/images/cb2700e9d323cd85 and click “Fetch”

Scroll down and click “Convert to lat/long”

View results on webmap with “Show map preview” button

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