Location "History"

I think a helpful feature would be a location "history". Something that logs your locations, much like an internet browswer history. Sometimes I stumble upon a location, move on and forget to add a location bookmark. What would be difficult though, is to have a history of all locations visited other than teleportation points. But perhaps a map with a "trail" depicting your location history might suffice. This feature would need more to it, I'm sure, but this is just a seed on an idea.

I've had similar issues where I end up somewhere cool, crash, and log in somewhere else (my last log-out location instead of last location) and then I have to either remember what the place was called or recall how I found it in the first place.

Desk-checked, not compiled or tested:

list history = [];
float PRECISION = 16; // don't track closer than 16m. Set to 256 to track sims only.
float RATE = 300; // check every 5 minutes or after teleport

save_history()
{
  vector here = llGetPos();
  vector square;
  square.x = llFloor(here.x/PRECISION) * PRECISION;
  square.y = llFloor(here.y/PRECISION) * PRECISION;
  square.z = 0;
  list spot = [llGetRegionName(),square];
  if (llListFindList(history, spot) == -1)
  {
    spot += [here];
    if (llGetListLength(history) >= 30)
      history = llListGetList(history, 3, -1);
    history += spot;
  }
}

show_history()
{
  integer i;
  integer n = llGetListLength(history);
  for(i -= 0; i < n; i+= 3)
    llOwnerSay(llList2String(history, i)+" "+(string)llList2Vector(history, i+2));
}
  
default
{
  state_entry()
  {
    llSetTimerEvent(RATE);
  }
  changed(integer what)
  {
    if(what & CHANGED_TELEPORT) save_history();
  }
  timer()
  {
    save_history();
  }
  touch_start(integer n)
  {
    if(llDetectedKey(0) == llGetOwner())
      show_history();
  }
}