[HTC One X] distortedloop:
I said it was 6 data points out of 500+. You're correct that no GPS would give 100% accurate every time, but it's a matter of scale. A bad GPS can reliably give bad data in most tracks, but 7 other phones I have in my possession give acceptably accurate tracks every time, and when they're off, they're off by distances measured in feet, not miles, and they don't have these odd spikes of miles off course and thousands of feet in altitude variance.

I ran two more tests last night. A static test, which was unacceptable, it displayed the wandering effect and recorded a quarter mile distance in a short time. The second test, a 1.5 mile walk, straight up the street and back, was almost perfect. All the variances in the track were within the normal variance I see on other phones.

I think there's a flaw with your logic that my using clockword mod instead of superwipe isn't revealing, the GPS has improved, so superwipe in and of itself is not the only solution.

What particular file on the sdcard do you think Superwipe cleaning "fixes" the GPS? Figure that out and we can save everyone the hassle of nandroid, superwipe, restore nandroid.

I think we can safely rule out that wiping any of the following folders would influence GPS because they're just app storage for things that have nothing to do with GPS:

delete_recursive("/sdcard/.bookmark_thumb1");

delete_recursive("/sdcard/.data/mail");

delete_recursive("/sdcard/Android/data/com.android.providers.media");

delete_recursive("/sdcard/Android/data/com.dropbox.android");

delete_recursive("/sdcard/Android/data/com.google.android.apps.books");

delete_recursive("/sdcard/Android/data/com.google.android.apps.genie.geniewidget.news-content-cache");

delete_recursive("/sdcard/Android/data/com.google.android.videos");

delete_recursive("/sdcard/Android/data/com.google.android.youtube");

delete_recursive("/sdcard/Android/data/com.htc.album");

delete_recursive("/sdcard/Android/data/com.htc.cloudstorage");

delete_recursive("/sdcard/LOST.DIR");

So we're left with these few potential candidates.

delete_recursive("/sdcard/.android_secure");

delete_recursive("/sdcard/.data/footprints");

delete_recursive("/sdcard/Android/data/com.google.android.apps.maps");

delete_recursive("/sdcard/.data/navigator/Data/Temporary");

The last three I doubt are the problem, but they're candidates because at least they have something to do with GPS.

My money would be on /.android_secure, which I believe is wiped by clockword, at least in a factory reset. EDIT: The problem with that is, I'm not sure that a nandroid restore doesn't restore those folders; I seem to recall it messing around with the .android_secure folder while watching it do it's thing on the screen. I may run a nandroid today to see if it does.

There's an option in GPS settings on the phone that allows you "reinstall application and storage card files for Location." Wherever that option puts stuff may be the answer.

I'm sure someone has tried that to fix the issue, probably without results, but it would be interesting to see if patching gps.conf and selecting that option helped the GPS.

I hope I'm not coming across as trying to give you a hard time over this. We're all just trying to find the simplest fix for the GPS that most people can live with. I imagine that this is still a hardware problem, and it's going to be hit and miss for anyone which of the various suggestions throughout the forums actually works for any particular device.

Bottom line for me is I still can't rely on the GPS on this particular HOX for the things I use a phone's GPS for. I need to trust that that when I go hiking, mountain biking, or running/walking that my track is accurate and doesn't need editing to make it useful.

Edit- If I can figure out how I can break the phone again to test wiping just a particular sdcard folder, I'll do it.