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Professional Geological Mapping

Geological Mapping is a specialised service offered by Survey Graphics, which is specifically aimed at Geologists who use aerial photography and aerial photo interpretation techniques to map geomorphology and geological structures.

Geological mapping or photo geology can be defined as the visual extraction of geological information from a photograph or image by conventional photo interpretation instruments and techniques. Traditionally the instrument most used by geologists is the stereoscope. The technique used is direct visual analysis of stereo paired photographs. Geological information is usually plotted on a transparent photo overlay.

Survey Graphics service provides the facility to transfer the distortion free geological information either to an orthorectified colour line map or orthorectified photo map.

Geological Remote Sensing & Photogrammetry

Geological remote sensing involves the optical (manual) and digital analysis of images from a vast array of remote sensing devices, from the ultraviolet through the visible, near-infrared (NIR), thermal infrared, and into the microwave wave lengths.

To assist geologists Survey Graphics maintains substantial technical resources and provides extensive knowledge and experience in the digital remote sensing field, utilising both satellites and airborne platforms.

With increasing resolution, lower cost and easy availability, high-resolution satellite data is becoming a popular choice for large and small scale regional geological mapping projects. High-resolution satellites like IKONOS / Quick Bird make it easier and more cost effective to create or update land form mapping and the study of regional scale geomorphology.

Photogrammetry is a form of remote sensing technology in which geometric properties about objects are determined from photographic images. Using high-precision photogrammetry, Survey Graphics can create digital maps, topographic surveys and intricate informational diagrams of almost any area.

Multispectral Data

The effective use of landsat and other types of multispectral scanner (MSS) data depends to a large degree not only on the skill of the geologist in selecting, analysing and interpreting the data for his or her specific needs, but in selecting the best possible processing technique, or combination of techniques, for the specific application and budget.