
Large-scale 89x 110cm survey map prepared by the USGS & the Government of Guam. Contours are given at 40' intervals & spot heights & sea-depths are also shown. All settlements & roads are clearly marked (including US military bases & NASA tracking stations). Rivers & coastal features (e.g. cliffs & reefs). Latitude & longitude are shown by margin ticks at 5' intervals. Margin ticks are also used to show the UTM grid at 5, 000m intervals.