The Ortman key, also known as the Ortman card or Ortman key card, is a structure used in geographical analysis, particularly in the field of cartography and mapping. It typically refers to a classification system of geographic features, which may include a wide range of landforms, water bodies, vegetation types, and human-made structures. The Ortman key is often employed in environmental studies and ecology to help researchers categorize and identify different types of ecosystems or landscape features based on specific criteria.
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