The mapping of land cover is done by adopting or developing a land cover classification system, delineating areas of relative homogeneity (basic cartographic “objects”), then labeling these areas using categories defined by the classification system. More detailed attributes of the individual areas are added as more information becomes available, and a process of validating both polygon pattern and labels is applied for editing and revising the map. This is done in an iterative fashion, with the results from one step causing re-evaluation of results from another step.
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