1. Before/after comparison
Comparing public imagery from before and after an event reveals what changed on the ground, retrospectively and from open data.
# before/after satellite imagery comparisonTyporithm · hard
Satellite & Damage Analysis
imagery-analysisosintsatellitedamagedocumentation
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Learn Satellite & Damage Analysis
Conflict Monitoring
Public satellite imagery (Sentinel, NASA, Planet) supports before/after comparison to document damage and activity, and NASA FIRMS adds fire detection. This is retrospective documentation from open data for the historical and legal record, as used by journalists and human-rights investigators — not live targeting.
Satellite analysis compares public imagery from before and after an event. Differences — collapsed structures, craters, scorched ground — corroborate or refute a claimed incident and are documented for the historical and legal record.
Open sources make this accessible. The Sentinel programme, NASA, and Planet publish imagery investigators can cite, and NASA FIRMS flags active fires and thermal anomalies, useful for confirming when and where damage occurred.
Crucially, this is retrospective work on already-published data. Journalists and human-rights investigators use it to document and preserve evidence to evidentiary standards; it is not a live feed for targeting, and it protects civilians and sources rather than exposing them.
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Before/after comparison shows what changed on the ground.
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NASA FIRMS detects fires and thermal anomalies.
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Sentinel, NASA, and Planet are public imagery sources.
# before/after satellite imagery comparison
# detect damage and fires (NASA FIRMS)
# free sources: Sentinel, NASA, Planet
# document for the historical recordRead the implementation
Connect each part of the code to the concept before you type.
2. Damage and fires
Damage signatures and NASA FIRMS fire detections help corroborate a claimed incident for the record.
# detect damage and fires (NASA FIRMS)3. Public sources
Sentinel, NASA, and Planet make satellite imagery openly available, so analysis stays on public, citable data.
# free sources: Sentinel, NASA, Planet4. Document the record
The output is documentation for the historical and legal record — not a live picture used for operations.
# document for the historical recordA complete learning loop
01
Understand
Read the concept map and follow the code breakdown.
02
Reconstruct
Type the implementation, repair mistakes and work through every recall exercise.
03
Verify
Use the final check without hints; revisit weak concepts in short practice sessions.