Compares one fixed 2021 baseline with imagery nearest each evacuation period, calculates visual change inside OpenStreetMap building footprints, fills only high-change building footprints in red and prints the detected damaged-building percentage directly on the after image. Intact buildings remain unmarked, and no circles are drawn. The result is a research screening layer—not verified damage.
TEST AOI · 47.0975, 37.5448 · Z17
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Important: exact images for every requested date may not exist. The page selects the nearest locally changed archive release and shows its underlying acquisition date when Esri metadata provides it. A release outside the requested window is marked as a proxy.
BASELINE · TARGET 2021-02-24—
Metadata pending
AFTER · 5–9 MAR 2022—
Metadata pending
UNOSAT Official Damage Assessment
United Nations Satellite Centre (UNITAR/UNOSAT) verified damage points overlaid on post-damage satellite imagery. Dots update based on selected evacuation window.
UNOSAT DAMAGE OVERLAY—
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UNOSAT Assessment
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of structures with visible damage
Nighttime Lights — Simulated from VIIRS Black Marble
Satellite imagery rendered as nighttime view with simulated city lights. Light intensity calibrated to real VIIRS Day/Night Band measurements. Bright pixels in the satellite image indicate buildings and infrastructure — their glow is reduced according to measured light loss during the siege.
BASELINE · Pre-conflict · 20 Feb 2022city illuminated
Simulated nighttime — 100% light output
DURING SIEGE—
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Light Intensity Comparison
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estimated light reduction over Mariupol
Light intensity calibrated to VIIRS DNB pixel brightness measured within Mariupol city bounds. Values relative to 20 Feb 2022 pre-invasion baseline.
NASA VIIRS Day/Night Band · Suomi NPP Satellite base: Esri Wayback World Imagery
Data-Driven Evacuation Analysis
Evacuation routes from the most damaged and darkest zones of Mariupol to Zaporizhzhia (agreed safe destination). Origins are data-driven: cells with highest damage + lowest light survival + most buildings. Routes thread through least-damaged cells via Dijkstra pathfinding on a 250 m grid. Hover over a zone for details.
EVACUATION ROUTE ANALYSIS—
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Evacuation Analysis
Population: OSM building centroids (45,544) Damage: UNOSAT CE20220223UKR · Lights: VIIRS Black Marble