Historical imagery
Esri Wayback keeps every past version of its world imagery since 2014. Sentinel-2 gives one cloud-free picture per year at 10 m.
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Swipe: drag the bar across the map. Left is the old date, right is today.
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Open files
KML, KMZ, GPX, GeoJSON, zipped shapefile (.zip), or CSV with coordinates in any grid. You can also drop files on the map. Files stay on this computer.
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Stored in this browser
Drawings and imported layers are kept in this browser automatically. Save a KML to keep a copy elsewhere.
About the data
Imagery: Esri World Imagery and Wayback (Maxar, Airbus and others), Sentinel-2 cloudless by EOX (Copernicus data). Elevation and sea floor: Terrain Tiles on AWS (SRTM, GMTED, ETOPO1). Maps: OpenStreetMap contributors, CARTO, OpenTopoMap, OpenFreeMap. Grid definitions: EPSG.