Methodology and Interpretation
AGCSL3 - Percent cropland on steep slopes
The proportion of each grid cell reporting unit that has agriculture
cropland land cover on slopes greater then 3 percent is calculated
using an overlay. The area where crops and slopes over 3 percent are
coincident is summed and divided by total reporting unit area.
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)