Automatic grading

[dittaeva]

Integrate functionality / code from the Autograd project?

Requirements

• Free and opensource code.
• The code need to be "pluggable", in that it need to be usable with the Waymarked Trails code which is Python/Django-based, without substantial code changes to the Waymarked Trails codebase itself. This to avoid diverging too much from the Waymarked Trails codebase.
• Reliance on free and open data: Should be possible to use with ASTER data (elevation) and data from OSM (surface). Take a look at the elevation profile code for route.is, and Espen Isaksens new elevation profile service.
• Possibility to use "live", as we will not save generated grading at this point (just as we do not save the elevation profile).

Original issue content:

(Before the Autograd project)

Based on OSM data about road type (footway/path, residential/tracktype5), surface (asphalt/mud), area type (residential/forest/desert), and elevation data (total elevation meters, see issue #26), and possibly weather/climate (lots of rain will make things slippier) and user feedback (see issue #32).