SIL411, Prescriptions Field Methods Book

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3.2 Stratification, Plot Sampling, and Mapping Procedures


Mapping provides a spatial representation of the physical, environmental, and interpretive features or units that will be considered in the development of the SP. SPPrescription mapping begins by delineating segments of the landscape where changes in landform and other environmental characteristics are recognized. This is known as stratification, and is usually accomplished through a combination of aerial photo interpretation and ground survey work.

Initial aerial photo delineation (stratification) is later field checked, and then mapped. Stratification and mapping for the SP includes:

1. stratifying using aerial photos;

2. field-truthing and assessing pre-typed map strata and recorded physical features;

3. refining map strata and delineating proposed interpretive units (including standards units) and reserves; and

4. producing the final map(s) which includes symbols for map units and relevant physical features.

The final SP map(s) will include an interpretive map which relates specific management practices to ecosystem units, and other features relevant to the SP.

The primary focus of this handbook is to outline the first three steps. Final map preparation is covered briefly for completeness, and the reader is referred to the Silviculture Prescription Guidebook, regional standards, or district guidelines for the final map production.

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