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Glossary of Terms
LIDAR stands for Light Detection and Ranging, is a remote sensing method that uses light in the form of a pulsed laser to measure ranges (variable distances) to the Earth. These light pulses, combined with other data recorded by the airborne system generate precise, three-dimensional information about the shape of the Earth and its surface characteristics.
Digital Elevation Model. This is a raster dataset which records the ground height for each cell.
Digital Surface Model. This is a raster dataset which records the height of each cell but includes non-ground objects eg; buildings, trees, etc.
Line features representing the ground elevation. These can be produced at various intervals e.g. 1 metre. The closer the contours are the steeper the gradient of the ground at that location.