Day of Archaeology 2015

Something old and something new: CAD migration and archive accessioning at ADS

ADSeasy-250x250As a reasonably new face at the Archaeology Data Service (ADS) I am still getting to grips with the somewhat baffling world of digital archiving and preservation! If someone had asked me this time last year when I was graduating what I saw myself doing in one year’s time, I would probably not have said doing a mass CAD file migration… But being a Digital Archivist for the ADS has so far been a fabulous experience.

Today I am working on two tasks, archiving collections coming through ADS-easy (for more information about ADS-easy see Ray Moore’s post from the Day of Archaeology in 2014 ), and continuing the ADS’ preservation work by migrating our historic CAD files.

It has been just over a year since the first ADS-easy archive was released, and a lot has happened in a year! For those who have not heard about ADS-easy, it is a system that allows users to electronically submit archaeological archives, along with metadata (information describing the files). It has significantly altered the workflow of digital archivists at the ADS as data from ADS-easy does not require manual inputting of metadata. Since last July we have worked on 71 archives, ranging from image collections, to excavation reports, to geophysical data. We have had 6636 unique visitors to the website and have an average of 250 unique visitors per month. Most of those are from the UK but visitors come from all over the world, including the US, Germany, Italy, France, and Spain. On average 8 archives are submitted each month and the number has been gradually rising.


Screenshot from The Grand Western Canal archive, submitted through ADS-easy (

My role within ADS-easy is to take the data we receive, accession it into our collections management system, convert the files into suitable preservation and dissemination formats- and document all of these processes!  Finally, I create an interface so that people can see the files on the ADS website. Today I am working on an image collection from a building recording of farm buildings in Lanchester, County Durham, and a data archive from an excavation in Crowle, Worcestershire. The data that comes in from ADS-easy is varied and often comes from small scale projects that would not otherwise be shared with the public. That is what makes the job both interesting and somewhat rewarding.

That has taken me up to lunch time, this afternoon I am carrying on with the long-running task of migrating all of our historic CAD files. Data that is archived at the ADS is continually ‘preserved’ over time to ensure that it is always readable and useable, and does not become obsolete. We are in the process of migrating our CAD files from earlier versions to the more recent 2010/2011 version. This has so far involved manually going through each collection containing CAD drawings and checking each file, converting them to the 2010 version, and then moving the previous versions to a migration folder. Another part of this process is creating a PDF file of each drawing to make them accessible to people who don’t own CAD software. All of this then needs to be documented in our collections management system so that the rest of the digital archivists know what I have done to the files, and where to find them if anything goes wrong!  After this the interfaces need updating to include the new PDF files.


Example of one of the many CAD plans the ADS holds. From Elizabeth House (

CAD migration may seem quite a repetitive task, but it has allowed me to look back at some of the earliest ADS collections, such as the excavations at Eynsham Abbey in the late 80s/ early 90s, and the survey and excavation at the Iron Age emporium of Vetren . This process of migration is a very important part of what the ADS does; active management of our data means that it should (in theory!) always be accessible to the public in the most useful file formats and have longevity.

Better get back to it, those remaining 1000(ish) CAD files won’t migrate themselves!