Any OpenStreetMap contributors / which GPS for logging slope grade?
I bike around the city, and have a few apps for OpenStreetMap on my phone.
Things like OpenCycleMap, as far as I can tell, have a relatively coarse elevation map of the whole world, and use that to interpolate the actual grade of sloped streets.
However, OpenStreetMap lets you actually specify the grade for a specific street segment. I'd like to compute this reasonably accurately, and to specify those numbers by hand on streets with more than an N% climb.
Has anyone done something similar? What kind of GPS would I need - I guess one with a good altimeter?
Thanks in advance! A lowly phone GPS doesn't seem to cut it for this :)