;Centroid: The geometric center of a feature. For line, polygon, or three-dimensional features, it is the center of mass (or center of gravity) and may fall inside the feature or outside the feature.
;CHA: Confirmed Hazardous Area
;CDF: Custom Defined Fields are fields that IMSMA allows you to create, change, remove and are not predefined.
==D==__NOEDITSECTION__