Toponyms and Feature Classifications for the China Historical GIS
Towards Semi-Automatic Annotation of Toponyms on Old Maps
-
Upload
aboutgeo -
Category
Technology
-
view
289 -
download
3
description
Transcript of Towards Semi-Automatic Annotation of Toponyms on Old Maps
Towards Semi-Automatic Annotation ofToponyms on Old Maps
Rainer Simon, Peter PilgerstorferAustrian Institute of Technology
Leif IsaksenUniversity of Southampton
Elton BarkerThe Open University
September 19-20 2013 | 8th International Workshop on Digital Approaches to Cartographic Heritage, Rome, Italy
Map Digitization
But:Search & discovery limitedby 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 mapswith open source tools.
Approach:determine location, extent and orientationusing image processing andconnected component analysis
3 Step Process:Background/Foreground SeparationFeature DetectionFeature 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 enhancethe index
• Develop an “analysis workbench” to conductvisual & statistical comparions betweendifferent collections and documents
Thank you for your attentionhttp://pelagios-project.blogspot.co.uk
[email protected]@aboutgeo