Name: GpsCorrectionPlugin
Author: gerhard (contact by PM)
ST Version: 2.0.3067 or later
License: LGPL
Version: 0.1.22 2008-05-27
Home Page: http://hem.bredband.net/gerhardnospam/index_gpscorrection.htm
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Latest preview:
ST Version: 2.1.3478 or later
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This plugin is now handled on Google Code, together with other smaller ST plugins.
This page will no longer be maintained
Description
Corrects GPS routes by removing bad points
The Garmin devices have access to information about accurracy. In some situations the device can determine that some points are incorrect and decreases the Distance. Garmin is better at finding stops with no moving. This plugin will use the Distance information to drop bad points.
This will improve the accurracy when the reception is bad and the pace is low. For instance, a berry picking tour in the woods read 3.85 km in the Garmin, 5.70 km in ST before correction and 4.71 km after correction. The Garmin values seem more reliable from looking at the map, so the distance estimation is likely improved.
This will improve the accurracy when the reception is bad and the pace is low. For instance, a berry picking tour in the woods read 3.85 km in the Garmin, 5.70 km in ST before correction and 4.71 km after correction. The Garmin values seem more reliable from looking at the map, so the distance estimation is likely improved.
A use where the distance could matter is a marathon or so with pauses. The difference will be much smaller in example that matters. In activities without stoptime and decent reception, there is normally no difference.
Instruction
Import a second time from the ST .fitlog, or Garmin or .tcx, as ST does not read Distance tracks by default. The menu item will not be available when there are no Distance track. It is normally not a good idea to run this if you have manipulated the track somehow.
Note:There is no backup done by the plugin, to undo you need to import the GPS track agian. (The ST .fitlog can be used for that purpose.)
Two options in Edit menu:
- DifferenceToPowerTrack
If GPS and a DistanceTrack both exists (and no PowerTrack), it puts the distance difference in the PowerTrack.
Use it to try to find how the black magic in Garmin devices calculates distances compared to ST postprocessing. Even if the distance is not causing bad points, it shows where the problems likely are located.
(Until 0.1.21 in MiscPlugin)
- Adjust GPS from Device Distance
Drops the points where the device has noted a negative distance.
Installation/Uninstallation before 2.0.3067: Add/remove the DLL in the ST Plugins directory. (stored in the MiscPlugin folder by default). From 2.0.3067, this is handled from the ST application.
Requirements: none
Localization
English, svenska, français, español and Nederlands
Status
A fix, just to test, hoping to trigger a discussion of what can be done
Future
This was written as a simple test what could be done. An enhancement is to possibly drop more points where ST and Garmin has larger differences. A better long term solution is to reorder the GPS route somehow where you have the knowledge of the type of activity. (Some commercial map programs supposedly can do this.)
Acknowledgements
French translation by Meven
Spanish translation by mazoaguirre
Dutch translation by sdessein
ChangeLog
0.1.3536 2009-09-06 (preview)
Allow activation at import
Internal reworking
Uploaded to Google Code
0.1.22 2008-05-27
Update to ST 2.0.3067
Moved DifferenceToPowerTrack here from MiscPlugin
0.1.21 2008-03-26
Dutch translation
0.1.19 2008-03-25
Spanish translation
0.1.18 2008-03-09
French translation
0.1.3 2008-02-25
Adapted to ST2.0.2976 (due to internal changes in ST)
0.1.2
Link on settings page and a short description
0.0.4
Initial version