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| en:help:1.4:landmarks:statistics [2014/11/02 20:13] – alpinequest | en:help:1.4:landmarks:statistics [2014/11/02 21:51] – [Tracks statistics] alpinequest |
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| ====== Tracks statistics ====== | <sub>[[en:help|Online Help]] > [[en:help:1.4|AlpineQuest 1.4]] > [[en:help:1.4:landmarks|Landmarks]]</sub> |
| | ====== Statistics on tracks ====== |
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| ===== Gain and loss ===== | ===== Gain and loss ===== |
| At then end, the "perfect" gain definition would be something between these two last one. In order to compute the best gain approximation, the application will first remove noises from the track (including the GPS inaccuracy) to create a smoother altitude profile, and then compute the gain based on each location altitudes. | At then end, the "perfect" gain definition would be something between these two last one. In order to compute the best gain approximation, the application will first remove noises from the track (including the GPS inaccuracy) to create a smoother altitude profile, and then compute the gain based on each location altitudes. |
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| {{:icon_help.png?nolink}} You can di | {{:icon_help.png?nolink}} You can disable or increase the default noise reduction. In the statistics settings section, click on the ''"**Edit**"'' button {{:icon_01.png?nolink}}, and change the ''"**Noise reduction**"'' setting {{:icon_02.png?nolink}}. |
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| {{ :en:help:1.4:landmarks:statistics:settings.jpg?nolink }} | {{ :en:help:1.4:landmarks:statistics:settings.jpg?nolink }} |
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| | Here is the effect of the noise reduction on a track profile and gain computation: |
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| | * On the left, the noise reduction is disabled. The profile displays the unmodified jagged and spiky altitudes {{:icon_02.png?nolink}} (mostly due to the GPS inaccuracies), resulting in a high gain value {{:icon_02.png?nolink}} (+2535m); |
| | * In the middle, the noise reduction is on ''"**medium**"'', which is the default setting. Most noises are removed, resulting in a much smaller and less polluted gain value (+1717m); |
| | * On the right, the noise reduction is on ''"**big**"''. The profile smooth, with minors altitude changes lost, resulting in an even smaller gain value (+1634m). |
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| | {{:icon_help.png?nolink}} The first gain definition given above, gives an approximate under-estimation value of +1600m for this same track. |
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| {{ :en:help:1.4:landmarks:statistics:noise-reduction.jpg?nolink }} | {{ :en:help:1.4:landmarks:statistics:noise-reduction.jpg?nolink }} |
