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en:help:v2:landmarks:statistics [2016/04/28 12:22] – alpinequest | en:help:v2:landmarks:statistics [2017/05/01 05:58] – alpinequest |
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<sub>[[en:help|Online Help]] > [[en:help:v2|AlpineQuest 2.x]] > [[en:help:v2:landmarks|Landmarks]]</sub> | <sub>[[en:help|Online Help]] > [[en:help:v2|AlpineQuest 2.x]] > [[en:help:v2:landmarks|Landmarks]]</sub> |
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====== Details and statistics ====== | ====== Details and statistics ====== |
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===== Statistics settings ===== | ===== Graphics ===== |
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| The statistics details page gives a static preview of the elevation and speed profile. In order to get a fullscreen and dynamic version, click on ''"**Fullscreen**"'' {{:icon_01.png?nolink}}. On the fullsccreen page, you can: |
| * Click anywhere on the profile {{:icon_02.png?nolink}} to get the exact values at this location; |
| * Click on the ''"**Change X axis**"'' {{:icon_03.png?nolink}} icon to change the abscissa to ''"**Length**"'' or ''"**Time**"''; |
| * Click on one of the ''"**Change Y axis**"'' {{:icon_04.png?nolink}} icon to change one of the ordinates. The list of available fields {{:icon_05.png?nolink}} depends on the data included in the track file. |
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| {{ :en:help:v2:landmarks:statistics-3.jpg?nolink }} |
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| ===== How to change statistics settings? ===== |
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You can change various parameters to control the way statistics are computed. To do so, click on the ''"**Statistics settings**"'' icon {{:icon_01.png?nolink}}. | You can change various parameters to control the way statistics are computed. To do so, click on the ''"**Statistics settings**"'' icon {{:icon_01.png?nolink}}. |
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===== Gain and loss ===== | |
| ===== How to export statistics and graphics data? ===== |
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| Before computing statistics and displaying graphics of a track, the application will process its raw data (usually recorded using the GPS) based on the chosen settings to remove recording inaccuracies and discrepancies. You can export the processed data in a .CSV file: |
| * In the details view of a track, click on the action menu {{:icon_01.png?nolink}}; |
| * Select ''"**Export as...**"'' {{:icon_02.png?nolink}}; |
| * Choose ''"**CSV file / Profile (Data file)**"'' {{:icon_03.png?nolink}}. |
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| {{:icon_help.png?nolink}} After the export, you can easily share/upload the generated file using the ''"**Share**"'' button. |
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| {{ :en:help:v2:landmarks:statistics-4.jpg?nolink }} |
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| The following fields are exported: |
| * ''"**Longitude**"'' and ''"**Latitude**"'', the coordinates of the location buckets in the WGS84 (GPS) datum. A location bucket is a set of one or more locations from the original track, grouped together for algorithmic reasons; |
| * ''"**Distance**"'', the cumulative distance from the start point of the buckets, in meter (m); |
| * ''"**Time**"'', the cumulative time from the start date of the buckets, in second (s); |
| * ''"**Elevation**"'', the mean elevation values computed for the buckets, based on the GPS altitude values, in meter (m), over the EGM96 (Geoid) ellipsoid; |
| * ''"**Speed**"'', the mean speed values computed for the buckets, in meters per second (m/s); |
| * ''"**Slope**"'', the mean slope values computed for the buckets, in percent (%); |
| * ''"**Sea-level pressure**"'', the calibrated, sea-level equivalent mean pressure values computed for the buckets, in hectopascal (hpa); |
| * ''"**Pressure**"'', the un-calibrated, raw mean pressure values computed for the buckets, in hectopascal (hpa); |
| * ''"**Barometric elevation**"'', the mean elevation values computed for the buckets, based on the pressure values, in meters (m), over the EGM96 (Geoid) ellipsoid; |
| * ''"**Accuracy**"'', the mean accuracy (with a 68% confidence) values computed for the buckets, in meter (m); |
| * ''"**Elevation (diff.)**"'', the mean difference values between the GPS elevations and the barometric elevations for the buckets, in meter (m); |
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| ===== Gain and loss computation ===== |
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The gain is an important value that helps to appreciate the overall profile of a track. A small gain means that the track is mostly flat, a high gain means you'll have to climb a lot. | The gain is an important value that helps to appreciate the overall profile of a track. A small gain means that the track is mostly flat, a high gain means you'll have to climb a lot. |
Here is the effect of the noise reduction on a track profile and gain computation: | 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); | * On the left, the noise reduction is disabled. The profile displays the unmodified jagged and spiky altitudes {{:icon_01.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); | * 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). | * 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). |
{{:icon_help.png?nolink}} The first gain definition given above, gives an approximate under-estimation value of +1600m for this same track. | {{: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:v2:landmarks:statistics-noise-reduction.jpg?nolink }} |