The March 2015 WAML Information Bulletin contains an article on weeding a map collection that includes Multnomah County Library's criteria (as well as observations and advice).  Here is the link:
http://www.waml.org/ib/waml-information-bulletin/46-2/weeding-the-map-collection-observations-and-advice/
Hope this helps.
Tom


On Fri, Jun 10, 2016 at 9:23 AM, Tomasz Mrozewski <[log in to unmask]> wrote:
Hello,
 
Wondering if anyone would like to share their policies and their workflows for weeding map collections. We have none at Laurentian and I've stumbled on a trove of superseded materials - seems like a good opportunity to develop our own policies.
 
Thanks,
Tomasz
 
 
Tomasz Mrozewski
Data, GIS and Government Documents Librarian / Bibliothécaire pour les données, les services géospatials et les documents gouvernementaux
Bibliothèque J.N. Desmarais Library
935 Ramsey Lake Road
Sudbury, ON P3E 2C6
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(705) 675-1151 x3325