• Datum. Datums are defined by a set of constants defines the coordinate system to be used to calculate the coordinates of the point on the Earth. datums are NAD27 and NAD83, WGS84 is. The facts are used when the geodetic coordinates were converted to UTM coordinates drawing must correspond with milestone selected in the list. Google Earth uses by default the WGS84 reference for coordinate conversion. the hemisphere. If the site is located on the equator of the Earth's northern hemisphere must be checked, if not choosing the southern hemisphere. the unit. May is in meters or feet.UTM Zone dialog box properties
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