Managing land use and the Earth’s resources is becoming increasingly important due to the rising world population and economic growth. To keep pace with demand, planners, resources managers, and application scientists now use frequently acquired high-resolution and/or multispectral images.

Sound application depends on the availability of up-to-date, reliable and well-structured information. Satellite images from various sensors and digital aerial photographs are often used as data sources, along with modern techniques such as laser altimetry. Technical means to reference and extract topographic and thematic information from these sources in semi-automated processing environments are continuously under development. It is essential to train the staff responsible for acquiring such reference data not only in established and upcoming techniques such as object-based classification but also in understanding the relevancy of the acquisition process and its reliability for current GIS specialists.

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