So if you lay over 5 land surveys you get a system message saying you can only lay a max of 5 per day, but if you remove one of the surveys from the gameworld you can then place another one no problem
However, I've noticed that if another players removes the surveys that were placed, then it does not count back from the 5 total for the original character that laid the survey. THis means that I have 0 surveys in the game world, but I'm unable to place another because the game thinks I still have 5 laid out somewhere