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| en:help:1.4:tracker [2014/06/09 15:32] – alpinequest | en:help:1.4:tracker [2015/02/09 18:03] – external edit 127.0.0.1 |
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| * The "**''Update frequency''**" {{:icon_02.png?nolink}} allows you to choose how fast the locations have to be recorded. For runners, a precise tracking is recommend, whereas hikers should prefer a medium one, since a fast tracking will use more battery. | * The "**''Update frequency''**" {{:icon_02.png?nolink}} allows you to choose how fast the locations have to be recorded. For runners, a precise tracking is recommend, whereas hikers should prefer a medium one, since a fast tracking will use more battery. |
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| {{:icon_help.png?nolink}} Some location sources can be disabled from the device settings. Click on the "**''Location sources''**" {{:icon_04.png?nolink}} button to access these settings easily. | {{:icon_help.png?nolink}} Some location sources can be disabled from the device settings. Click on the "**''Location sources''**" {{:icon_03.png?nolink}} button to access these settings easily. |
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| ==== Locations filtering ==== | ==== Locations filtering ==== |
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| {{ :en:help:1.4:tracker:tracker-settings-2.jpg?nolink}} | Location filters allow you to reduce the amount of recorded locations in order to reduce the battery usage and to increase the tracking accuracy (by reducing GPS inaccuracy errors). |
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| Location filters allow you to reduce the amount of recorded locations to reduce battery usage and to increase the tracking accuracy. | {{ :en:help:1.4:tracker:tracker-settings-2.jpg?nolink}} |
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| {{:icon_help.png?nolink}} The "''**accuracy filter**''" will avoid recording erroneous locations while temporary loss of accuracies, while the "''**distance filter**''" will avoid recording useless similar locations while not moving. | {{:icon_help.png?nolink}} The "''**accuracy filter**''" will avoid recording erroneous locations while temporary loss of accuracies, while the "''**distance filter**''" will avoid recording useless similar locations while not moving. |
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| When a new location is computed by the GPS based on the update frequency, the application will: | When a new location is computed by the GPS based on the update frequency, the application will: |
| * Check that the location accuracy is better or equals to the "''**accuracy filter**''" setting {{:icon_08.png?nolink}}; | * Check that the location accuracy is better or equals to the "''**accuracy filter**''" setting {{:icon_05.png?nolink}}; |
| * Check that the distance from the previous location is greater or equals to the "''**distance filter**''" setting {{:icon_07.png?nolink}}, or that the location accuracy is better than the previous one. | * Check that the distance from the previous location is greater or equals to the "''**distance filter**''" setting {{:icon_04.png?nolink}}, or that the location accuracy is better than the previous one. |
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| For instance, when using an update frequency of 5 seconds, a distance filter of 3 meters and an accuracy filter of +/-256 meters, all recorded locations: | For instance, when using an update frequency of 5 seconds, a distance filter of 3 meters and an accuracy filter of +/-256 meters, all recorded locations: |
| ==== Barometric elevations ==== | ==== Barometric elevations ==== |
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| If your device has a built-in pressure sensor, you can activate the "**''barometric elevations''**" {{:icon_08.png?nolink}} feature which will compute elevation values based on the air pressure, in addition to the common GPS elevations. These barometric altitudes are much more accurate and reactive, and can be computed precisely even if the GPS signal is very poor. | If your device has a built-in pressure sensor, you can activate the "**''barometric elevations''**" {{:icon_07.png?nolink}} feature which will compute elevation values based on the air pressure, in addition to the common GPS elevations. These barometric altitudes are much more accurate and reactive, and can be computed precisely even if the GPS signal is very poor. |
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| {{:icon_help.png?nolink}} The barometric data is auto-calibrated by AlpineQuest using GPS locations. | {{:icon_help.png?nolink}} The barometric data is auto-calibrated by AlpineQuest using GPS locations. |
