A data structure for describing sampling designs to aid in compilation of stand attributes

Maintaining permanent plot data with different sampling designs over long periods within an organization, and sharing such information between organizations, requires that common standards be used. A data structure for the description of the sampling design within a stand is proposed. It is composed of just those variables and their relationships needed to compile stand attributes and their variances. The data structure is able to incorporate changes in design that commonly occur through the life of a set of permanent plots. Using the data structure, seven actual or proposed designs, from simple to complex, are adequately described. Applications of the data structure for designing sampling schemes and for cataloging data are included.