[Qgis-user] wishing for accurate lattitude/longitude from a cell phone

[Garth Fletcher]

The situation I was working with involved 30 points, some involving long 
hikes through the woods, spread around the periphery of a 36 square mile 
area with heavy foliage and poor or non-existent cell phone coverage. 
This precluded the use of any real-time reference base signals.
My solution thus was using a dual frequency GNSS receiver with 30+ 
minute observation times and post-processing to get to 1 meter accuracy.

However, if the problem had been one of accurately measuring points in a 
smaller area, for example an archeological site, then relative 
positioning would have been much more practical.  This would have been 
done, at lower cost and higher accuracy, with a base plus rover unit 
pair such as those described at https://emlid.com/reachrs/.  Or, if good 
internet connection was available throughout the site, possibly with a 
single rover plus connection to an external reference provider.

Regarding the question about where to locate the base unit, I would 
guess that a location with wide clear view of the sky would be the first 
priority, followed by good RF paths to all rover sites for the 
correction signals from base to rover.
-- 
Garth Fletcher