I think this is kinda stupid to be honest.
Attaching this to a drone that could be flown in an automatic grid pattern over the area... Would be more logical. A cat is unpredictable and would hardly return with a thorough analysis of the area. The only benefit to the cat would be the innocuous manner in which it could move. However I think even Wardriving or Warwalking would provide you with a better analysis over the same time period and wouldn't attract any more attention than the cat.