A "watchlist" could be manually set up to monitor all activity or object changes made in one or more of the assigned rectangular areas on the map.
ˈeɪ "wˈɑːtʃlɪst" kʊd biː mˈænjuːəli sˈɛt ˌʌp tə mˈɑːnɪɾɚɹ ˈɔːl æktˈɪvᵻɾi ɔːɹ ˈɑːbdʒɛkt tʃˈeɪndʒᵻz mˌeɪd ɪn wˈʌn ɔːɹ mˈoːɹ ʌvðɪ ɐsˈaɪnd ɹɛktˈæŋɡjʊlɚɹ ˈɛɹiəz ɔnðə mˈæp.