GPSLog Labs Blog

GPSLog Labs Blog

New features and tips for using

Filed under: bestefforts   changelog  

Updates for May 27th

  • GPSLog Labs now calculates "Best efforts" for your uploaded activity. This is a powerful new analysis that finds the fastest sections of an activity over standard distances and allows them to be compared easily. For example, it may find that the fastest 10km of a run was the last portion, and allow that to be compared against all other times you've run that distance or further. The times for each distance are shown on the Comparisons tab of the Activity detail page using box plots to compare them to other activity on the same route or with the same tags.

    Activity times are extrapolated if they are close to a standard distance (within about 10%).

    Best efforts replace the old "standard splits" which were locked to the start of the activity, which were similar but limited in usefulness.

  • Clicking on the best effort distance will show the Best Effort Detail tab:

    This shows the detailed statistics for the best effort and compares it to similar efforts on other activity for the route and tags.

    There's also a map showing the segment of the log where the best effort was recorded, the fastest sections with and without stops are coloured blue and green, the whole track being shown in grey.

    The best effort is highlighted on the speed graphs too, in the example below, the best efforts with and without stops coincide:

  • The computed best efforts can unfortunately often be incorrect due to bad GPS data, and while it's possible to clean up the activity using the Filters, it is also possible to solve this problem by giving the system an indication of a more reasonable maximum speed for the best effort.

    Click the"Recompute best effort" button on the detail page for the incorrect best effort:

    This will recompute the best effort for this activity, but will ignore any potential best efforts that are above the speed indicated as reasonable. By lowering the speed you should be able to find a best effort that ignores sections which are "corrupted" due to bad GPS data.
  • Best efforts are summarised for tags and routes, allowing you to find your fastest times over given distances:
  • Best efforts can be visualised for a route too, to give an indication of where the sections you go fastest are: The altitude profile of the route is superimposed over a chart indicating the locations of the recorded best efforts at each distance for activity on the route.
  • The Activity Filters editing page has been improved for filters that discard a lot of points so they are now displayed without slowing down the page unnecessarily.
  • Waypoints have been added to time/manual discard filter in addition to the position filter. This makes it possible to quickly and easily select a section of an activity where the GPS signal is bad and replace it with a more accurate representation of the track.
  • The little clock thumbnails now have an indication of a.m. and p.m. to help identify activity at a glance:
    Times are indicated as "a.m." with a thicker line going from the end time to noon.
    Times are indicated as "p.m." with the thicker line going from noon to the start time.
  • On the Organise Places page, there is a Network tab that shows a neat visualisation of your activity between the places you have created:
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