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A Fine Walk

於 2011年二月 8日 由 Simon PageEnglish發表。

OK, so the sun came out and I decided to put some GPS toys to the test and figure out a good work flow for mapping the area - especially public footpaths. So armed with a Garmin Forerunner 305 strapped on my wrist and my new HTC Desire phone, off I walked.

Now this is just a note to any Android users out there wanting to plot GPS and know where they are going - I've found a gorgeous app. I used OSMTracker for the tracking. Worked away in the background nicely, not using too much power and with easy to hit big buttons to record anything of interest.

Secondly I used BackCountry Navigator Pro for navigation. Wow. Caches the OS maps for off-line use (a real benefit where I live) and tracks your positions wonderfully. It too does record in GPX if needed. Cost? 6 GBP. Amazing. Poor old Garmin didn't get a look in although I know it's battery life is better than my phone.

Anyhow, it was a good, fun way of tracking that I will be using again once my feet have recovered!

位置: Hall Farm, Shipdham, Breckland District, Norfolk, England, IP25 7PZ, United Kingdom
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討論

liftarn2011年02月 9日 10時52分 發表的評論

I have tried OSMTracker and I agree it's a good app. The problem is I seem to get very bad accuracy with my phone. I generally get it down to 6 m. When using my separate GPS unit I get 0.8 meters under the same conditions.

HannesHH2011年02月 9日 15時30分 發表的評論

0.8 meters is way too good for a normal handheld. What unit do you use? Be aware that usually that number is only a "internal" accuracy, which means the points you track are inside that range but that range might be off reality. You could manage to get near that accuracy with WAAS/EGNOS.

OSMTracker is fantastic. I was dreaming of a tool like that for a long time. Ever since I got my HTC Desire I have not used the old etrex H again. Currently I track with both simultanously to see how different their tracks end up.

Simon Page2011年02月 9日 18時31分 發表的評論

I agree. 0.8 metres is a little too accurate! Actually, I'll upload the Garmin tonight to see who wins but I expect there will be little in it. A 6m accuracy isn't bad. You can normally see if you've crossed the road or fallen in a ditch!

HannesHH2011年02月 9日 22時30分 發表的評論

I forgot: Do check out Oruxmaps!
There are also some OSM editors that run on Android, but I have not tried any yet.

Simon Page2011年02月 9日 23時03分 發表的評論

Oh yes, nice find. Good to cache Google Earth in there as well :-) Time for a bigger SD card I think!

liftarn2011年02月10日 09時32分 發表的評論

My handheld unit is a Mio Digiwalker 168 and it uses the SiRFStarII GPS chipset with a rather large external antenna. 0.8 meters is what the software reports, but when comparing GPS traces with aerial images it looks like it actually is that accurate.
The accuracy on my phone is rarely even enough to be acceptable to OSMtracker.

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