- An investigative technique that involves comparing same sized indicators within an indicator category at separate locations; looking for either differences or similarities in appearance.
- Definition Extension: Includes the comparison of overall patterns and pattern clusters.
- The practice of comparing and contrasting the fire damage on different surfaces of an object that has been subjected to the oncoming fire.
- Definition Extension: Typically, the exposed side has more fire effects present than the contrasting protected side that normally has less fire effects visible.
Source: Guide to Wildland Fire Origin and Cause Determination, PMS 412.