The detail of the river’s position on the chart backs up the claim that this is the Ashburton River, which, being at 21 degrees 40 minutes south and 114 degrees 56 east, is almost exactly the latitude as shown on the chart, and given by Hessel Gerritsz as 21 degrees 45 minutes south latitude. The chart is oriented with north to the left, showing lines of latitude from 20th parallel south to the 35th parallel south at the base of the map. The lines of latitude appear to be very accurate, matching known features through the length of the chart.