Cm-level GPS accuracy is coming within our grasp... My attention was recently drawn to this:
http://www.kickstarter.com/projects/swiftnav/piksi-the-rtk-gps-receiver [2] On 2013-09-13 15:06, OpenStreetmap HADW wrote: > I don't think I would trust commercial GPS much below 5m unless it was > > averaged over at least an hour, with a clear view of the sky > (reflections off builidngs could systematically distort the position > solution - see http://wiki.openstreetmap.org/wiki/Accuracy#Systematic_errors > [1]). > Where I've looked into calibrating against GPS I've tended to find > that there are good places that are accurately locatable on Bing where > you can sit with GPS for a long time without looking suspicious, and > which are near to points of interest and have a clear view of the > sky. Links: ------ [1] http://wiki.openstreetmap.org/wiki/Accuracy#Systematic_errors [2] http://www.kickstarter.com/projects/swiftnav/piksi-the-rtk-gps-receiver
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