Wildfire Knowledge Graph · Fire Investigation
The broader area within which the point of origin is investigated or constrained by physical, witness and contextual evidence.
In plain language
The broader area within which the point of origin is investigated or constrained by physical, witness and contextual evidence.
Why it matters
Origin Area is useful because it separates one specific part of wildfire behaviour, exposure, operations or evidence from nearby concepts that can otherwise be mixed together.
Origin area: represent uncertainty as geography, not a guess
An origin area is the location or region within which investigators place the likely start of a fire, subject to evidence and uncertainty. In an incomplete investigation, an area can be more truthful than a single point, especially if early records are sparse or physical evidence has been altered.
Remote sensing can sometimes establish that fire was active in an area at a given overpass time, but a satellite active-fire pixel is not an automatic origin polygon. Likewise, the first call to dispatch may describe a visible fire some distance away from its actual point of origin.
Evidence workflow: preserve the reported area, observation and report times, the method that generated the boundary, and any subsequent narrower or wider versions. If only a general narrative location is available, retain the text rather than converting it to a falsely accurate geometry.
A reconstruction should distinguish ‘earliest observed activity’, ‘investigator-defined origin area’, ‘final point of origin’ and ‘suspected cause’. These concepts answer different questions even when they refer to the same incident.
Compare Point of Origin with Active Fire Detection.