In other words, it makes life dramatically simpler for a huge range of surveying and mapping tasks. In GIS, specifying WGS84 as the datum means you can use GPS data directly. Anyone can use the following live GISsurfer map to help learn about UTM coordinates. It primarily allows a definition of what you mean by the co-ordinate origin and the orientation of the axes of the reference frame, together with the reference ellipsoid you are using. This map with a UTM grid will work in most browsers on most devices including cell phones. ![]() The map is displayed by GISsurfer which is a general purpose web map based on the Leaflet map API (Application Program Interface). Using UTM specifies how lat/long locations are represented as E/N co-ordinates in the database and also on the screen or a printed map. ![]() ![]() If you want to use anything other than latitude/longitude to specify locations, you need a map projection. WGS84 allows you to have a datum, in the full meaning of the term, and this is projected using the map projection.
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