ABSTRACT
Field data are defined as verified, or verifiable, data collected using proven, relatively close range techniques such that the resultant data are much more accurate, consistent and at a higher resolution than the information derived from remotely sensed data with which the field data are to be used. Remotely sensed data are used to provide consistent, spatially extensive information. Field data are used to improve information extraction from remotely sensed data, to calibrate either the data or the information, and to assess the accuracy of the derived information. Field data are point or localised data.
