Maintenance work on the ZORA databases is scheduled for Wednesday 22 May 2019 from 20:00-22:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Imfeld, Stephan; Haller, Ruedi; Laube, Patrick (2006). Positional accuracy of biological research data in GIS – A case study in the Swiss National Park. In: 7th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, Lissabon (P), 5 July 2006 - 7 July 2006, 275-280.