Open a log CSV with the button or drop it anywhere on the page; it is read in your browser and not uploaded. The page reopens the last log you loaded on this device. Save KML gives the current log as a Google Earth file: here it comes as a .zip holding the .kml, and in the offline HTML copy as a plain .kml. The graphs run reading by reading, so time when the logger was not recording is not shown. Hover or tap the track or any graph; the map, the details strip and every graph follow the same reading. Fatigue, friction and speed use fixed colour bands; impact, crest and displacement have no agreed limits yet, so their colours split each log at its own median, 75th and 95th percentile. Coordinates use (raw × 0.0000001) − 210, with a negative raw value read as unsigned 32-bit. Readings without a GPS fix (raw 0xFFFFFFFF, speed 256) are left off the map and graphs.