Methodology and Interpretation
FEA210 - Proportion of forest edge area to total forest
Proportion of forest edge area to total forest is calculated as amount of
forest area that is less than 210 meters from any non-forest land cover type
divided by total forest area in the 3 km grid cell reporting unit. This metric
provides information on the ratio of edge and interior forest in the grid cell.
High values represent large amounts of edge and little interior forest in the
grid cell, while low values represent large amounts of interior and small amounts
of edge forest.
Quantile: Each class contains an approximately equal number (count) of features. A quantile
classification is well-suited to linearly distributed data. Because features are grouped by the number
within each class, the resulting map can be misleading, in that similar features can be separated into
adjacent classes, or features with widely different values can be lumped into the same class. This
distortion can be minimized by increasing the number of classes.
Natural Breaks: Classes are based on natural groupings of data values. Natural break points
are identified by looking for groupings and patterns inherent in the data. The features are divided
into classes whose boundaries are set where there are relatively large jumps in the distribution of
* EMAP-West Landscape Metrics Metadata (FGDC)