oa Integrating Remote Sensing and GIS Technologies for Surface Geotechnical and<br>Geological Analysis

Whilst there is no substitute for the field work of experienced geoscientists in undertaking geological<br>and geotechnical surface mapping, increasingly surface mapping can be undertaken using remote<br>sensing technologies, together with GIS techniques, with greater confidence than in the past. Several<br>major issues caused problems with early remote sensing techniques, especially using early Landsat<br>satellites. Firstly, the poor resolution (80 metre pixel size) of the imagery and, secondly, the lack of<br>multi-spectral bands specifically dedicated to the detection of radiation useful to discriminate surface<br>geology.