We're using the iOS version of collector on iPad pared with the external GPS receiver. From Miaogang's post it seems that the accuracy level displayed is that of the internal receiver, rather than the external unit, so the features we plot with this setup should be more accurate that the app indicates. Is this a limitation of iOS location manager, rather than the app itself? It would be useful to know a fairly exact figure for location accuracy for some of the work we do using Collector.
Thanks both for your help with this.