Why are the maps downloaded?

For the most of the area of NSW mobile reception is either non-existent or too poor to support the display of maps delivered from the internet. See below for the Telstra coverage for NSW. The two other mobile network providers, Optus and Vodafone, have similar or less coverage.

Telstra 3G Coverage April 2015 - for devices without an external antenna

Downloading the geology and geophysics maps to your phone (while you have an internet connection) requires some time and patience, but when done, you can use your maps anywhere in the great outdoors of NSW and the map app will always respond instantly.

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