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 downloadable csv file with latitude/longitude, 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.

Quick Demo

Open App in a new tab: Toponym Extractor

Download (right click and save) sample geojson file with text annotations.

Upload that file in card one, MapReader detections

Paste this Allmaps Georeference Annotation link in card two and click “Fetch”:

https://annotations.allmaps.org/images/cb2700e9d323cd85

Scroll down and click “Convert to lat/long”

View results on webmap with “Show map preview” button

Learn More

View a more detailed workflow with screenshots.

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