[HOT] Feedbacks about smartphones use for OSM field surveys

Guttorm Flatabø post at guttormflatabo.com
Tue Sep 25 21:46:00 BST 2012


I do realize that this thread is old, but I figured you'd be interested in a
diary entry I wrote<http://www.openstreetmap.org/user/Guttorm%20Flatab%C3%B8/diary/17490>on
the subject of using external bluetooth GPS with Android phone.

On a sidenote OSMTracker for
Android<https://play.google.com/store/apps/details?id=me.guillaumin.android.osmtracker&feature=search_result#?t=W251bGwsMSwxLDEsIm1lLmd1aWxsYXVtaW4uYW5kcm9pZC5vc210cmFja2VyIl0.>
can
now upload tracks directly to OpenStreetMap, and
Vespucci<https://play.google.com/store/apps/details?id=de.blau.android&feature=search_result#?t=W251bGwsMSwxLDEsImRlLmJsYXUuYW5kcm9pZCJd>
is
days from releasing a greatly enhanced
version<https://groups.google.com/forum/?hl=en&fromgroups=#!topic/osmeditor4android/TCM9ht_2lCI>
.

On Tue, Jul 10, 2012 at 1:47 PM, Boris Cornet <borisC at osm-at.org> wrote:

> Cell phones use cheap chips and small antennas, which is not good for
> accuracy. And the ability to receive the single (!) compatible Russian
> satellite (so far) is merely an advertising gag.
>

They are still often very good, and much better than old GPS devices.
However, as I note in the diary entry it seems they're made to be too
optimistic. The Russian satellites I was referring to are in the
GLONASS<http://en.wikipedia.org/wiki/GLONASS>system, and they have 24
operational satellites. The combination of GPS and
GLONASS supposedly improves general accuracy and position stability because
of ability to receive signals from more satellites at a time, and GLONASS
alone is supposed to provide better accuracy at northern latitudes. A quick
search on Google Scholar brought
references<http://mycoordinates.org/ppp-using-combined-gps-glonass-measurements/>to
support this.

--
Guttorm
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