Location - from east to west Sky-view fraction PT1 0.11 PT2 0.11 PT3 0.1 PT4 0.11 PT5 0.12 PT6 0.15 PT7 0.19 PT8 0.25 PT9 0.21 PT10 0.24 PT11 0.21 PT12 0.22 PT13 0.25 PT14 0.25 PT15 0.27 PT16 0.31 PT17 0.31 PT18 0.29 PT19 0.31 PT20 0.32 PT21 0.31 PT22 0.32 PT23 0.36 PT24 0.39 PT25 0.39 PT26 0.41 PT27 0.43 PT28 0.44 PT29 0.46 PT30 0.43 PT31 0.43 PT32 0.4 PT33 0.42 PT34 0.42 PT35 0.45 PT36 0.43 PT37 0.41 PT38 0.44 PT39 0.45 PT40 0.44 PT41 0.37 PT42 0.29