Hello again, concerning the limitation imposed by GPS hardware, I have to point out that on my smartphone (GT-I9505) there is an option among localization services which can be checked as high precision in GPS postion seeking that uses wifi and 3G in addition to GPS. As a matter of fact that option goes beyond GPS hardware limitation and makes me able to retrieve positioning with a very low precision error. I have to make tests now installing qgis on my phone and I will post results as soon as possibile.
Giuseppe De Marco 2014-06-04 20:34 GMT+02:00 Giuseppe De Marco <[email protected]>: > Thank for your quick reply . > I went searching on the internet > and I've found an interesting project named Piksi. > Guess we'll have to wait and see! > > 2014-06-04 16:17 GMT+02:00 Richard McDonnell <[email protected]>: >> This is down to the accuracy of the Receiver, nothing to do with QGIS. >> You wont get Survey Grade data collection from any Tablet on the market >> at present. Even with a Survey Grade GNSS Receiver connected to your >> tablet, a 3.0 meter accuracy would be best case scenario. Your only >> solution is a dedicated GNSS Enable hand-held data collection unit, >> utilising a real-time correction service, a number of Providers provide >> such solutions, but they are expensive. >> Regards, >> >> Richard. >> >> >> On 04/06/2014 10:07, Giuseppe De Marco wrote: >>> hello, I've been using Qgis on android tablet (samsung galaxy tab 2) >>> and I've been experimenting GPS connection. >>> The issue is that even if Qgis finds and use several satellites (9 or more) >>> precision never gets under 3.0 meters but what is strange is that >>> coordinates value fro the same spot varies very widely: >>> Time Coordinates Altitude >>> 14:39:36 41.69528959 13.26464738 343.1 >>> 14:39:54 41.69529880 13.26466761 341.8 >>> 14:40:06 41.69528519 13.26470222 340.4 >>> 14:41:18 41.69528944 13.26472418 341.1 >>> 14:41:42 41.69529608 13.26471821 341.8 >>> 14:41:54 41.69530621 13.26470892 342.5 >>> >>> I have colleagues who have experienced the same. >>> Has anyone else experienced the same issue? >>> Is that depending on GPS device or could it be a software related >>> issue? >>> >> >> >> ********************************************************************** >> Email Disclaimer: http://www.opw.ie/en/disclaimer/ >> ********************************************************************** >> > > > > -- > Dott. Agr. Giuseppe De Marco > RSPP settore ATECO 1 > Cell./Mobile: +39 3935041115 > Fax.: +39 07751850973 > PEC: [email protected] -- Dott. Agr. Giuseppe De Marco RSPP settore ATECO 1 Cell./Mobile: +39 3935041115 Fax.: +39 07751850973 PEC: [email protected] _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
