Base maps are designed to have other data overlayed onto them, they are the base layer of information most often used to add context to the data.
The 3 primary types used are:
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Imagery
Topographic
Terrain
These and many other base maps can be viewed and accessed in web service format from the Queensland Government Spatial Portal.
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Imagery is the most current openly licensed imagery, restricted imagery cannot be utilised
Topographic basemaps do not include back ground imagery they do however include roads, rail etc
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