The elevation gain reported in "bookmarked routes" is inaccurate, although the elevation gain displayed graphically seems to be correct. I mapped a route for a loop hike I've done, and while the total elevation change is correct (0'), the elevation gain is double what it's supposed to be. It seems as if gmap-pedometer is counting ANY change in elevation as gain. I haven't quite seen this problem brought up before in the forum, so either I'm experiencing a random bug or no one else has noticed a problem.
While we're on the topic, is there any possible way to implement three elevation data columns? Total Elevation Change, Elevation Gain, Elevation loss.
You are not wrong, the measurement is wrong. I experience the same problem. And also the total elavation gain can be incorrect. I tested it on several paths and it seems that e.g. any tree that overhangs a way is measured as elavation change. That leads of course to wrong data of height and so to a wrong elavation gain. As the values are so beyond the reality, for me they are useless anyhow.