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Nick As well as ADS you might want to contact your EH Science Advisor – or at least Jim Williams in E Midlands. We had a discussion at an EMALGAO meeting last week about appropriate digital formats for storage, with the issues that have already been rehearsed about time/costs and file size/storage capacity, in the context of PDFs degrading each time they are opened and TIFs being the more-appropriate storage medium. One suggestion – if there are storage issues (and who doesn’t have those?) - was to have two PDF copies, one as a master (unused or used very, very infrequently) and one to be accessed. Personally I don’t know if that would be appropriate but I pass on some of the fruits (such as they are) of that discussion. Regards Ken Ken Smith Cultural Heritage Manager Peak District National Park Authority tel: 01629 816206 mob: 07870 986863 From: Issues related to Historic Environment Records [mailto:[log in to unmask]] On Behalf Of Wise, Julia Sent: 18 September 2012 14:35 To: [log in to unmask] Subject: Re: Digitisation Project Hi Nick, I hit the same problem last year when trying to develop a spec for security and high quality scanning the Bucks HER collections. We also came to the conclusion that it had to be a balance between practicalities (file size, image quality, network storage space) and getting the highest quality scans we could afford (time & money). What I plumped for was 600dpi pdfs for security scanning HER files, reports, maps and plans etc and for images (our vertical AP collection) 600dpi uncompressed Tiffs as the archival master copy and 600dpi jpegs as the working copy. All the APS (black & white and colour) were scanned as 24-bit colour images as these gave the best quality images in test scanning. We don't have paper excavation archives to worry about, so (following a discussion with ADS) I decided not to specify pdf/A formats. You might want to think in advance about file-naming...if you get this right it will save a lot of time having to go back and rename files! Regards, Julia Julia Wise Historic Environment Record Officer Planning, Advisory and Compliance Service Place Services Buckinghamshire County Council New County Offices Aylesbury Bucks HP20 1UY Tel: 01296 382072 E-mail: [log in to unmask] http://www.buckscc.gov.uk/bcc/archaeology/Archaeology.page? ________________________________ From: Issues related to Historic Environment Records [mailto:[log in to unmask]] On Behalf Of Nick Boldrini Sent: 18 September 2012 13:23 To: [log in to unmask] Subject: Digitisation Project hi guys some advice/thoughts appreciated on the following topic please. We are considering a very small digitisation project, and I am trying to work out some issues. Basically, a small charitable, volunteer run archive in another town to the HER has a collection of paper files we think would be useful to the HER. Rather than Hard copy them I am planning on scanning them. This is 1) to save space in the HER 2) to make a semi archive/disaster back up copy (which we will also supply them with a copy of) 3) to give us a working copy for reference and 4) subject to agreement, to allow us to make it accessible online at some point in the future there are many issues around this - copyright, etc etc But the one I am scratching my head over at the moment is what file format to scan them into. The aim isn't to make a fully archive quality scan, as we're not the archive it should go to, so really want a back up copy. That said, as we're scanning them, it would make sense to make the scan as good as we can with one eye on it being the digital archive, but we have to balance that against the limited resource available for this project. It is a fairly simple project in that we will do it in house through our printer/fax/copying beast (the files are all a4 so will fit easily enough), and although I am waiting for details of the exact proportions, I know there is a mixture of text and images, including colour as well To trade off time versus quality I am considering doing them all in one format - and the main ones that seem appropriate are TIFF or PDF (ie that our machine can do). I have been trawling guidance from eg Digital Curation Centre, ADS, Digital Preservation Coalition, but can't see anything which suggests which format you should use for born-analogue (I guess that’s the phrase?) data. They talk about formats generally and suggest both PDF/A (though I think we would have to scan them as PDFs and then convert them to PDF/A) and TIFFS are ok as archive mediums, but not which one you should use, as what I have found seems to assume most scanning will be of hardcopy fotos. My hunch is you would use PDF for text and TIFF for Images, but as I said I am trying to see if there are reasons NOT to use one format for both. I can think of disadvantages, but would welcome any thoughts on this, and/or pointers to specific documents or parts of documents which discuss this - as I can't seem to find anything. hope that sort of makes sense tar best wishes Nick Boldrini Historic Environment Record Officer Archaeology Section Design and Historic Environment Team Planning Service Regeneration and Economic Development Durham County Council County Hall Durham DH1 5UQ Tel: 03000 267008 [log in to unmask]<mailto:[log in to unmask]> **Now available ** Order your copy of "Faverdale, Darlington: excavations at a major settlement in the northern frontier zone of Roman Britain" by Jennifer Proctor. 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