Timeline for Distance calculation : Integrating incremental gps data
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 9, 2016 at 10:04 | answer | added | Jacques | timeline score: 0 | |
| Apr 6, 2015 at 5:54 | vote | accept | srinathhs | ||
| Jul 17, 2012 at 5:33 | comment | added | srinathhs | let us continue this discussion in chat | |
| Jul 16, 2012 at 20:51 | comment | added | whuber | Yes, the accuracy is poor for the first 900 values and the last couple of hundred. BTW, how close would 44,454 be to the distance you expect? | |
| Jul 16, 2012 at 19:20 | comment | added | srinathhs | I just added raw nmea sample output, very new to nmea parsing, can you have a look and tell me is that enough to determine if the device is stationary ? ( I think the device has not yet acquired a valid fix ) | |
| Jul 16, 2012 at 19:17 | history | edited | srinathhs | CC BY-SA 3.0 |
added nmea
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| Jul 16, 2012 at 19:07 | comment | added | whuber | I am beginning to think you are much better off with the raw NMEA data, because the Android calculations do not appear to make the most basic corrections for using geographic coordinates. Moreover, it will be more reliable to identify the noise in the raw data than to try to filter it out of data that have been processed according to some unknown algorithm. | |
| Jul 16, 2012 at 18:53 | comment | added | srinathhs | The data is been calculated inside android internally and this is all I get from it. Android is handling the calculations. I sense it is better to calculate them myself using raw NMEA data ? | |
| Jul 16, 2012 at 18:43 | comment | added | whuber | Because speed does not correlate at all well with differences in latitude and longitude, could you please explain what the speed means and how it is measured? There's a similar question about headings, but I also want to add that they are systematically wrong: they appear to have been computed from unprojected coordinates using Euclidean calculations. This alone will account for up to 2.5% of the error at latitudes of 13 degrees. | |
| Jul 16, 2012 at 18:10 | history | edited | srinathhs | CC BY-SA 3.0 |
Added more details
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| Jul 16, 2012 at 17:28 | comment | added | srinathhs | @mhoran_psprep I needed an algorithm to incorporate altitude. ALso the altitude data fluctuates and is not very accurate. | |
| Jul 16, 2012 at 13:27 | answer | added | whuber | timeline score: 6 | |
| Jul 16, 2012 at 12:29 | comment | added | mhoran_psprep | Is there something that limits your ability to incorporate altitude? | |
| Jul 16, 2012 at 6:51 | history | asked | srinathhs | CC BY-SA 3.0 |