Use disaster imagery to prioritise property review
Build a preliminary property review from available post-event imagery, source dates and visible changes while keeping uncertainty explicit.
After a disaster, property teams need to understand where further information is required. Available imagery can contribute an external view of affected locations and help organise questions for the people responsible for assessment and response.
The first useful output is a preliminary review list: which sites have a usable observation, what is visibly different and what remains unknown. It is not a final damage determination or a substitute for current emergency information.
Establish what the imagery actually covers
Record the source, capture date and area shown. Check whether the image was captured after the event relevant to the review. An image received today may still be a pre-event view.
Visibility and timeliness affect the usefulness of this evidence. FEMA's preliminary damage assessment guide discusses imagery as one information source and describes limitations affecting its quality and availability. Do not assume usable property-level imagery will arrive within a fixed number of hours.
Build the site list before assigning conclusions
Match property locations carefully and retain any uncertainty about boundaries. Record whether each site has a usable view, an obscured view or no relevant new image. Those states need different follow-up.
A property outside the visible observation area should remain unassessed. A site with no obvious external difference should not automatically be described as undamaged. The image may not show the relevant condition.
Compare visible external conditions
Where a suitable baseline exists, compare the same area across dates. Describe the visible difference and any factors that complicate it. Keep a possible observation separate from a confirmed assessment.
For an illustrative case, a site may appear to have debris around an external area in a post-event image. A reviewer can record the location and request appropriate current information. The image does not establish whether the building is safe to enter, the condition of its interior or the value of a loss.
Prepare a clear handoff
Give the responsible team enough context to continue:
- Property identifier and location.
- Relevant pre-event and post-event capture dates.
- The visible observation.
- Obscured areas and remaining uncertainty.
- The information or qualified assessment needed next.
- The person responsible for follow-up.
Use the organisation's established response arrangements. Do not use an old image to direct someone into an affected area or treat a research shortlist as an operational clearance.
Update the record as evidence arrives
Local reports, inspections and better imagery may change the initial interpretation. Keep the new evidence and explain why the assessment changed. Retaining the history is more useful than silently replacing one conclusion with another.
Satellite observations can help organise property review, but they do not settle insurance causation, coverage or final damage classification. Keep those decisions with the appropriate evidence and responsible professionals.
GeoSpectre combines AI detection in satellite imagery with supporting information to help users assess physical findings. Explore the product, or discuss your property-review requirements.
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Key takeaways
- Verify that imagery covers the relevant site and post-event period.
- Separate usable observations, obscured views and unassessed locations.
- Visible change is preliminary evidence, not a final damage or safety determination.
- Update the review record as qualified assessments and better evidence arrive.