On 12/06/2014 10:28, Giuseppe De Marco wrote:
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]
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