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Before and After Images

The USGS has science based work that often requires the comparison of two geographic areas over time. Though scientific data is critical to understanding changes over time, visually seeing those changes is a powerful tool in support of that data. 

Filter Total Items: 322
TNMCorps Mapping Challenge: City/Town Halls in NC
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TNMCorps Mapping Challenge: City/Town Halls in NC as of 03/03/21
TNMCorps Mapping Challenge: FireStations in AR
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TNMCorps Mapping Challenge: Fire Stations in AR as of 02/25/21
TNMCorps Mapping Challenge: FireStations in AR
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TNMCorps Mapping Challenge: Fire Stations in AR as of 03/03/21
TNMCorps Mapping Challenge: Schools in CA NV
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TNMCorps Mapping Challenge: Schools in CA NV as of 02/25/21
Webcam view of snow covered Blanco River at Crabapple showing local road.  River in the upper third of the image.
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Blanco River at Crabapple, before and after February 2021 snowfall
Webcam view of snow covered Blanco River at Wimberly showing bridge.  River from the upper left of image to center right.
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Blanco River at Wimberly, before and after February 2021 snowfall
TNMCorps Mapping Challenge: City/Town Halls in NC
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TNMCorps Mapping Challenge: City/Town Halls in NC as of 02/18/21
TNMCorps Mapping Challenge: City/Town Halls in NC
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TNMCorps Mapping Challenge: City/Town Halls in NC as of 02/25/21
TNMCorps Mapping Challenge: FireStations in AR
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TNMCorps Mapping Challenge: Fire Stations in AR as of 02/18/21
TNMCorps Mapping Challenge: FireStations in CA NV AZ
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TNMCorps Mapping Challenge: Fire Stations in CA, NV, AZ as of 02/18/21
TNMCorps Mapping Challenge: City/Town Halls in CA & NV
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TNMCorps Mapping Challenge: City/Town Halls in CA & NV as of 01/21/21
TNMCorps Mapping Challenge: City/Town Halls in CA & NV
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TNMCorps Mapping Challenge: City/Town Halls in CA & NV as of 01/28/21
TNMCorps Mapping Challenge: FireStations in CA NV AZ
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TNMCorps Mapping Challenge: Fire Stations in CA, NV, AZ as of 02/04/21
TNMCorps Mapping Challenge: FireStations in CA NV AZ
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TNMCorps Mapping Challenge: Fire Stations in CA, NV, AZ as of 02/11/21
TNMCorps Mapping Challenge: Schools in TX
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TNMCorps Mapping Challenge: Schools in TX as of 01/21/21
TNMCorps Mapping Challenge: Schools in TX
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TNMCorps Mapping Challenge: Schools in TX as of 01/28/21
TNMCorps Mapping Challenge: Schools in TX
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TNMCorps Mapping Challenge: Schools in TX as of 02/04/21
TNMCorps Mapping Challenge: City/Town Halls in CA & NV
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TNMCorps Mapping Challenge: City/Town Halls in CA & NV as of 01/14/21
TNMCorps Mapping Challenge: Schools in MO
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TNMCorps Mapping Challenge: Schools in MO as of 01/14/21
TNMCorps Mapping Challenge: Schools in TX
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TNMCorps Mapping Challenge: Schools in TX as of 01/14/21
Color photograph of lava lake
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KW webcam shows that Halema‘uma‘u lava lake island rotated