**apologies for cross-postings** Hi, We are currently organizing a special issue on Collaborative Mapping for the International Journal of Geo-Information. The deadline is 28 Feb 2013 and you can find more information on the journal website: http://www.mdpi.com/journal/ijgi/special_issues/collaborative-mapping We look forward to your contributions! Best wishes, Linda See, Steffen Fritz, Jan de Leeuw International Institute of Applied Systems Analysis (IIASA) Ecosystems Services and Management Schlossplatz 1 A-2361 Laxenburg Austria ICRAF World Agroforestry Centre United Nations Avenue Gigiri PO Box 30677 Nairobi 00100 Kenya