News

04 Apr 2018

Exploration Imagery delivers immediate insight

Know where to look before you hit the ground

For thirty years, Geoimage has provided services to resource exploration companies through many of the key stages, covering both regional and targeted site selection. 

Our cutting-edge satellite imagery offers up to an astonishing 30cm resolution for detailed images over priority areas.  Stereo capability delivers Digital Terrain Models with better accuracy than LiDAR of the same resolution, often at a much lower cost. 




A cost-effective approach

Initial Regional Analysis and Area Selection

The processes of area selection and target identification can significantly benefit from the use of satellite imagery. With a large archive and relatively low entry price, medium resolution satellite data can be used along with spectral processing derivatives to locate smaller areas of interest.

Once these areas of particular interest have been defined, clients can subsequently task these areas to be captured by the higher resolution satellites. This two-stage approach reduces overall costs by mitigating multiple data capture missions through the use of appropriately scaled datasets.


By identifying structural features, alteration signatures and more, we’re able to highlight ore bodies and their respective mineralisations. Having worked closely with the exploration sector for many years, Geoimage can recommend particular sensors and techniques to aid in exploration depending on a desired area, commodity and requirements.

We offer spectral processing suites of both high-resolution SWIR’s from WorldView-3, and the eve SWIR’s from ASTER. Our DEMs can also assist with delineating structure features, and we are now able to produce a 50cm DEM with 30cm contours!


The best ways to uncover a wealth of insights

Spectral processing


The Landsat Enhanced Thematic Mapper Plus (ETM+) sensors measure wavelengths that are useful for identifying alterations associated with minerals. As Landsat ETM+ includes a shortwave infrared band from 2.08-2.35mm, it can not only determine rock types, but also map hydrothermal clays. 

ASTER sensors are also able to leverage multiple thermal imagery to identify epithermal clay minerals, iron oxides, silica, carbonate, malice and propylitic alteration. This imagery is best used for regional mapping at scales down to 1:50,000.

When combined with the satellite-derived surface elevation models, both these products described can be used in stereo analysis to delineate structural features. A two-fold approach between both products is quite common, with lower resolution SRTM data being commonly used for the initial analysis, and high-resolution elevation data consequently being utilised over the areas that show the potential.


If you’re seeking to explore an area to identify potential minerals, ores or propylitic alterations, our team of satellite imagery experts can help. Call us now on 07 3319 4990 or email us via sales@geoimage.com.au.

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