How to combine location evidence without inventing a risk score
Keep geographic identity, historical events, terrain summaries and place references as separate evidence records. They differ in scale, time and meaning. A transparent decision matrix preserves those differences instead of presenting an unsupported combined risk number.
Procedure
Verify one location and record coordinate uncertainty and district identifier.
For every layer retain source, licence, spatial scale, observation period and coverage status.
List findings and missing dependencies separately, then send material decisions to the responsible reviewer.
Interpretation checks
Input or condition
How to interpret it
Administrative identity
Which reference geography contains the location.
Historical footprint
What was observed for particular archive events.
Terrain and places
Regional elevation and mapped context, with different scales.
Illustrative working example
Code illustrates a review procedure, not an observed result. Replace illustrative inputs with verified records; missing values deliberately remain unknown.
evidence = [
{"layer": "terrain", "scale": "district", "observed_at": None},
{"layer": "flood-history", "scale": "event-extent", "observed_at": None}
]
# Preserve each evidence record; do not average unlike measures.
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 auditable evidence matrix for site review, insurance research or property due diligence. It is not a validated risk model or a substitute for professional review.
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.
Your privacy, your choiceHelp us make MapScale more useful.
With your permission, we use analytics to learn which pages and demos help. No ads or cross-site tracking, and MapScale works the same either way. Read our privacy policy.