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CartoLegend

Scanned maps
to GIS data.

The model extracts point symbols, map-unit regions, labels, and border coordinates from scanned geologic maps.

Compare input and output View examples

Real USGS scan · Frederick, Maryland · saved research output

See input / output

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Saved model outputs

What the model found

15 saved-output cases. Exact boxes, masks, printed values, and parsed records.

POINTBlack Crystal01 / 05
source

Frederick · input/output

Compare the scan
with the model output.

Drag the slider. The two images are aligned to the same map position.

Original scanned Frederick geologic map
CartoLegend saved polygon interpretation of the Frederick map
Original scan Model output
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PIXEL-ALIGNED REVEAL

Move the slider.

Bright regions are assigned model output. Point at one to read its exact saved map-unit code; dark areas are unassigned.

2,743polygon contours
1,042delivered features
PINNED UNIT EXAMPLESYhmOClTbs

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Evaluation results

Scores and
saved outputs.

Frozen evaluations and recorded output counts.

REGION RECALL 87%

303 of 347 reviewed target regions found.

REGION PRECISION 74%

Measured on the same 10 public map sheets.

ROW RECOVERY 159/167

Known point-symbol rows recovered across six splits.

FREDERICK PASS2,743

polygon contours

DELIVERED1,042

saved features

UNIT CODES267

distinct codes

PIXELS ASSIGNED48.78%

unassigned areas remain visible

HUGHES PASS1,329

saved regions from 50 labels

GEOREFERENCE9

border coordinates in the pictured case