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reichsanzeiger-gt

DOI 10.5281/zenodo.10144428

Ground truth for German newspaper "Deutscher Reichsanzeiger und Preußischer Staatsanzeiger" (German Imperial Gazette and Prussian Official Gazette), which was published under changing names from 1819 to 1945 (https://digi.bib.uni-mannheim.de/periodika/reichsanzeiger/ausgaben).

The ground truth is provided as PAGE-XML and URLs for the corresponding newspaper scans/images. Use the provided bash-script to download the images.

Images:

Images can be downloaded via script

./download_images.sh

Quantity:

  • 197 single newspaper pages
  • 119 429 ground truth lines

Period:

1820–1939

Font / Writing class:

Fraktur, Latin

Languages:

German, English, French, Portuguese, Italian, Latin

Transcription guidelines:

All transcriptions were created using Transkribus. The transcription rules are based on the OCR-D transcription guidelines Level 2 with some exceptions (see below):

Special characters:

  • Long s (ſ)
  • Currency symbols: German Mark (ℳ) and Pfennig (₰), $, £
  • Fractions (¼ ½ ¾ ⅐ ⅑ ⅒ ⅓ ⅔ ⅕ ⅖ ⅗ ⅘ ⅙ ⅚ ⅛ ⅜ ⅝ ⅞)
  • Fraction slash (⁄) (U+2044), if
    • can't be transcribed by a unicode fraction representation
    • numerator and denominator are not on the same baseline height
  • R rotunda (ꝛ)
  • Combining Latin Small Letter E for old German Umlaut ( ͤ )
  • Dagger (†)
  • Black Right Pointing Index (☛)
  • Black Left Pointing Index (☚)
  • White square (□)
  • Superscript Numbers 0-9 (⁰¹²³⁴⁵⁶⁷⁸⁹)

Normalizations:

  • Roman numerals ⅠⅤ Ⅹ Ⅼ Ⅽ Ⅾ Ⅿ --> I V X L C D M
  • Em dash (—) instead of En dash (–)
  • Asterisk (*) used for both standard asterisk (*) and tear-drop asterisk (✽)

Additional characters transcribed true to original (contrary to OCR-D Level 2):

  • Double oblique hyphen (⸗)

Funding

This revision is predominantly funded by the German Research Foundation (DFG).

Links