After spending weeks playing with my own 2-year GPS log, I wanted to colorize each track gradiently based on velocity.
While it sounds straight-forward to use the "trackpoints" table in the same SpatiaLite database to achieve this, it turned out not so. Plotting millions of points is quite slow and …
GPS tracks have to be cleansed (removing outliers) before analysis, and cleansing requires some manual editing.
For this manual editing, I searched around for a good tool. Many are available, but there's no definite winner. Here's the detailed comparison.
Note that this comparison is only for manual cleansing of …
read more