ðə mˈæp wʌz mˈɑːɹkt ˈɔf ɪn ɐ skwˈɛɹ ɡɹˈɪd, bˌʌt ðɪs wʌz jˈuːzd fɔːɹ tɹˈækɪŋ hˈɪdən mˈuːvmənt, nˌɑːt tə ɹˈɛɡjʊlˌeɪt ɹˈɛɡjʊlɚ mˈuːvmənt.
The map was marked off in a square grid, but this was used for tracking hidden movement, not to regulate regular movement.