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I would like to be able to use GPS on my phone, in conjunction with an app, to enable O&M (Orientation and Mobility) support, on my device.

I want the app to tell a blind person walking along a rural carless path by a silent river when they are deciding from the path.

The path is mostly straight, with some bends. I want to know whether, on a clear day, the GPS can detect displacements of two meters. If not, what is the displacement accuracy if GPS.

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    With DGPS correction (WAAS/EGNOS) 1-3m possible in rural areas, but not under trees. – Zoltan Sep 27 '16 at 15:17
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    Affordable RTK (Real-Time Kinematics) GPS for sub metre precision indiegogo.com/projects/reach-first-affordable-rtk-gps-receiver# ($570.00) – Mapperz Sep 27 '16 at 17:03
  • Do these use different technologies than standard GPS? If the signal is different, why does it cost more to use it? Do these technologies user proprietary signals or something? Thanks. – Jack Maddington Sep 27 '16 at 22:33

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