Hot Spot Detection
Interpolations created using simple geospatial methods may be useful in identifying hot spots; however, plotting data values on a site map relative to suspected historical source or release areas may be equally helpful. Hot spots are often tentatively identified during EDA. A simple graphical presentation of the data may help to identify hot spots because they stand out as areas of high concentration. Box plots, histograms, and normal probability plots may provide objective standards against which to identify extreme values (see GSMC-1, Section 5.1, Graphical Methods, GSMC-1 Section 5.10, Identification of Outliers). Sample design tools specifically for hot spot detection are available in the Visual Sample Plan (VSP) software package. The VSP hot spot detection tool uses a traditional statistics algorithm that does not employ any of the geospatial methods discussed here.
Understanding the Results▼Read more