How often does elevation data change?

Question

I own a challenge cache that uses cache elevation info to determine qualifications, GC1ZAZG, High in Colorado Challenge Cache. I've noticed that elevations for many of the caches have changed in the past couple of weeks. Most of them didn't change much. One changed over 500 feet but appears to be much more accurate now. Do you know if this is an ongoing update of the elevation info or was that a one time thing? Can you share where you get the elevation data from?

Answer 1

Depending on your viewpoint, you could say that this is an ongoing update or a one-time update.

In more detail, Project-GC sources its elevation data from https://www.gpxz.io/. Due to recent updates to the quality and accuracy of the elevation data, we have opted to re-calculate the elevations of every geocache. We are processing geocaches based on their latitude, starting at the south pole and working towards the north pole. We expect the process to take, at the very least, another three months to complete. So, in that sense, it is both ongoing and one-time.