I’m looking for a web tool that can show speed and gradient info directly on a GPS trace. I want to see if I can use that info to guess the mtb:scale or dirtbike:scale for unclassified trail segments and then later display those gradients in iD for further mapping.
Charts are nice and many apps have them, but having color-coded gradients right on the GPS trace would be better.
I’ve played around with gradients and Mapbox’s GEOJSON SimpleStyle before, so I might build it myself if needed. But first, I want to see if there’s something out there that already does this.
From things I have read in the past I think the vertical accuracy on GPS is generally poor enough that most applications that show an elevation profile actually “drop” the points onto a terrain model before plotting them.
[Their (beautiful) render is available only for central and southeast Europe, but elsewhere one can switch to Carto or aerials from the toolbar at the bottom]
