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As part of our work to demonstrate the value for money of the Digimap Collections, EDINA has calculated the commercial cost of all the data downloaded and maps created for printing. We calculated the values per institution for the period August 2013 to July 2014 then totalled them; this came to approximately £65.4 million. This estimate is a conservative one because we reduce the quantity of data downloaded by 60% to account for duplication. When all the maps printed and data downloaded were included in the calculation (i.e assuming users would continue to take their own data and maps, and not share them) this total rises to over £107 million.
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We know that some data is downloaded multiple times within an institution, for example by students for a class exercise or by researchers for specific study sites. We found that on average only 40% of the data taken from Digimap over a period of time was unique within an institution. We believe that if institutions were paying commercial rates for their data they would be more likely to download it once and circulate it to those who need it; this is why we reduce the amount of data included in our calculation. However, there is considerable variation between institutions as to how much is unique; those that do more research or are smaller in size tend to have a greater proportion of unique downloads, so we calculated the 100% figure as a ceiling value.
In total, over the past four academic years over £306 million (£170 million at 40%) worth of print maps and data has been served up from Digimap to subscribing institutions. The steep increase in 2013-14 was caused by more Ordnance Survey products being downloaded and printed than ever before and also by the high commercial costs of several products added to the Geology Digimap service.
How the Costs are Calculated
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The costs used in our calculations for the data come from the list prices published by data suppliers, and include any relevant multipliers or discounts declared publicly on their websites.
The data costs we calculated are done on a per product / per institution basis, with the data preparation and licensing charges assigned only once per product, per institution (rather than per data request). Many of the data collections are commercially licensed based on the number of users who have access to the data; with increasing numbers of users a multiplier is applied to a base cost. We applied the relevant multipliers according to the number of active registered users for each Collection at an institution.
We capped data costs at the price of national coverage for each product, making it impossible to assign greater cost for any one product than it would be to supply the entire dataset for use by a whole institution.
The values for the print maps (including saved maps in all Roam applications) are calculated by finding the cheapest commercially available map prints from websites such as eMapsite, NLS and FiND.
What We Didn’t Include
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No monetary values were assigned to the millions of screen maps that are produced from Digimap. Â The value calculated also doesn’t take into account any of the help materials, training courses and support facilities that are all part of the Digimap service.
No OpenData downloads or maps created from OpenData are included in the calculation, despite the advantages of producing them from Digimap rather than other websites.
However, the biggest saving that isn’t included in these value calculations is your time. We only charged the data supplier’s preparation and licensing costs once per product or order, in line with each company’s policy where it applied. In reality there would be many orders occurring throughout an academic year as new research questions are raised. This all costs time, time which the data suppliers will charge for or that institutional staff would have to take to submit requests for data and time for staff to create and manage a repository for spatial data.
With 24 hour access to high quality data and maps through a purpose built mapping and data download interface, Digimap does all this work for its subscribers.
Over the coming weeks we will be sending out each institution’s data cost calculations to Digimap site representatives. If you are interested in the commercial costs of the maps and data your institution has been using please contact your site represenative. If you are unsure who your site representative is, please contact us:
- email: edina@ed.ac.uk
- phone: 0131 650 3302
