How to interpret Thailand historical flood extents
A published satellite extent records an observed event footprint. An overlap is evidence for that observation; no overlap cannot establish that a location has never flooded. The MapScale archive is historical and fixed, not a forecast.
Procedure
Fix the asset coordinates and retain the positional uncertainty.
Retrieve a bounded archive view and inspect its dates, sources and truncation before spatial comparison.
Record each event overlap separately and commission additional records when a financial decision needs a complete history.
Interpretation checks
Input or condition
How to interpret it
Overlap
Observed footprint intersects the location for a named event.
No overlap
No matching extent in the returned archive; not a dry-history certificate.
Truncated response
Continue the returned cursor before treating the request as complete.
Illustrative working example
Code illustrates a review procedure, not an observed result. Replace illustrative inputs with verified records; missing values deliberately remain unknown.
review = {"historical_overlap": None, "event_date": None}
# None = not yet evaluated, never evidence of zero flood risk.
# Record observation date and extent before assigning overlap.
Bounded API request
Read-only public request, limited to 100 features. Check HTTP status, freshness and pagination before interpreting the result. Foundation layers use their dedicated APIs; this is not a bulk database export.
An event-by-event overlap register with observation dates and missing-history notes. It is not an actuarial probability, depth estimate or insurance quote.
Historical or versioned data; no real-time freshness claim
Dataset limits
A fixed archive of historical satellite flood-extent observations (UNOSAT). It is not a real-time flood map, and absence of an extent is not evidence that an area stayed dry.
Historical or versioned data; no real-time freshness claim
Dataset limits
District-level elevation summaries sampled from Copernicus DEM GLO-30. They are regional context, not parcel or building elevation and not a flood-probability model.
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