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Towards Semi-Automatic Annotation of Toponyms on Old Maps
 

Towards Semi-Automatic Annotation of Toponyms on Old Maps

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    Towards Semi-Automatic Annotation of Toponyms on Old Maps Towards Semi-Automatic Annotation of Toponyms on Old Maps Presentation Transcript

    • Towards Semi-Automatic Annotation of Toponyms on Old Maps Rainer Simon, Peter Pilgerstorfer Austrian Institute of Technology Leif Isaksen University of Southampton Elton Barker The Open University September 19-20 2013 | 8th International Workshop on Digital Approaches to Cartographic Heritage, Rome, Italy
    • Map Digitization
    • But: Search & discovery limited by available catalog metadata!
    • Spatial Search?
    • (Caistor St. Edmund) „Venta“ Toponyms?
    • (Whitchurch) „Mediolanum“ Toponyms?
    • (Lincoln) „Lindum“ Toponyms?
    • Transcription? OCR? Remains a huge challenge. We envision a semi-automatic process in which a human expert is assisted in “annotation grunt work”
    • Goal: detect toponyms on old maps with open source tools.
    • Approach: determine location, extent and orientation using image processing and connected component analysis
    • 3 Step Process: Background/Foreground Separation Feature Detection Feature Linking
    • Step 1: Background/Foreground Note: our steps still include manual tuning/intervention.
    • Step 2: Feature Detection
    • Step 3: Feature Linking
    • Some preliminary results:
    • Experiment #1 Ptolemaic Map of the British Isles, ca. 1480 © The British Library Board. Harley MS 7182 ff.. 60v-61.
    • Experiment #2 Josephinische Landesaufnahme: Gebiet von Moos- kirchen bis Grazer Feld, Österreich, 1764-1787.
    • Experiment #3 Salvator Oliva, Mediterranean. Portolan Atlas, Marseilles, 1619. • 333 toponyms counted • 532 detections • ~50% recall • ~31% precision
    • http://rsimon.github.com/toponym_identification Full-resolution views at
    • Future work – Pelagios 3: • Provide an index of toponyms in early geospatial documents • Create assistive annotation tools to enhance the index • Develop an “analysis workbench” to conduct visual & statistical comparions between different collections and documents
    • Thank you for your attention http://pelagios-project.blogspot.co.uk rainer.simon@ait.ac.at @aboutgeo