This application is on behalf of the Portable Antiquities Scheme and the British Museum, in conjunction with the American Numismatics Society.

Within this project, we would like your help to assist with computational, automatic assignment of a numismatic numbering system (Roman Imperial Coinage) to Portable Antiquities Scheme (PAS) data. The PAS database was built by the MicroPasts' project co-Investigator, Daniel Pett, and contains details for hundreds of thousands of Roman Imperial coins found by the public in England and Wales.

Collaborating with Ethan Gruber, from the ANS, a script has been written to try and match PAS coins to the RIC numbering system. However, fuzzy matches are produced and ths is what we need help with fixing.

So what would we like you to do?

Each coin within this project can have up to 4 potential matches within the numbering system as shown in the example below:

We would like you to review the PAS recorded data and the ANS data derived through computational methods from the ANS' Online Coins of the Roman Empire (OCRE) project.

Each record will be shown with up to 4 matches with the numbering format in this style:

ric.1(2).tib.26

Which means for example:

• Roman Imperial Coinage volume 1
• Second Edition
• Emperor Tiberius
• Number 26

We would then like you to review and compare the metadata and example images for each matched type to the PAS data using the image carousel below the text (see below).

If you feel you can choose a match, click a radio button. Then decide how certain you are with your ID by using the slider as shown below (0 = uncertain, 5 = maybe, 10 = extremely certain).

You then have the chance to tell us more! Firstly you can check the box to tell us that the PAS record needs revising and secondly whether you think that the coin cannot be attributed easily.

If you would like to tell us more about the record, or suggest improvements, you could fill in the comments box.