jˈuːzɪŋ ɐ sˈɪmpəl ɡɹˈæfɪkəl ˈɛdɪɾɪŋ tˈuːl, jˈuːzɚz ɑːɹ ˈeɪbəl tə dɹˈɔː ɐn ˈaʊtlaɪn ɔːɹ pˈɑːlɪɡˌɑːn ðæt mˈætʃᵻz ðə sˈæɾəlˌaɪt ˈɪmɪdʒ lˈeɪɚɹ ˌʌndɚnˈiːθ.
Using a simple graphical editing tool, users are able to draw an outline or polygon that matches the satellite image layer underneath.