1. Is PPGIS good enough? An empirical evaluation of the quality of PPGIS crowd-sourced spatial data for conservation planning. (February 2015) Authors: Brown, Greg; Weber, Delene; de Bie, Kelly Journal: Land use policy Issue: Volume 43(2015:Feb.) Page Start: 228 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗