A before-and-after image showing the change in edits between 8/30/21 and 9/09/21. Volunteers edited over 120 points during this timeframe (public domain).
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: 320
TNMCorps Mapping Challenge: Schools in CO NoHistory as of 09/09/21
A before-and-after image showing the change in edits between 8/30/21 and 9/09/21. Volunteers edited over 120 points during this timeframe (public domain).
TNMCorps Mapping Challenge: Schools in CO NoHistory as of 09/16/21
A before-and-after image showing the change in edits between 9/09/21 and 9/16/21 (public domain).
A before-and-after image showing the change in edits between 9/09/21 and 9/16/21 (public domain).
TNMCorps Mapping Challenge: Schools in CO NoHistory as of 09/23/21
A before-and-after image showing the change in edits between 9/16/21 and 9/23/21. Over 100 edits came in during this time period (public domain).
A before-and-after image showing the change in edits between 9/16/21 and 9/23/21. Over 100 edits came in during this time period (public domain).
TNMCorps Mapping Challenge: City/Town Halls in IA, MN as of 08/19/21
A before-and-after image showing the change in edits between 8/05/21 and 8/19/21. Volunteers edited over 250 points during this timeframe.
A before-and-after image showing the change in edits between 8/05/21 and 8/19/21. Volunteers edited over 250 points during this timeframe.
TNMCorps Mapping Challenge: City/Town Halls in IA, MN as of 08/30/21
TNMCorps Mapping Challenge: City/Town Halls in IA, MN as of 08/30/21
TNMCorps Mapping Challenge: City/Town Halls in IA, MN as of 08/30/21
TNMCorps Mapping Challenge: Law Enforcement in KS & OK as of 08/19/21
A before-and-after image showing the change in edits between 8/05/21 and 8/19/21. Volunteers edited over 40 points during this timeframe.
A before-and-after image showing the change in edits between 8/05/21 and 8/19/21. Volunteers edited over 40 points during this timeframe.
TNMCorps Mapping Challenge: Law Enforcement in KS & OK as of 08/30/21
TNMCorps Mapping Challenge: Law Enforcement in KS & OK as of 08/30/21
TNMCorps Mapping Challenge: Law Enforcement in KS & OK as of 08/30/21
TNMCorps Mapping Challenge: Schools in CO NoHistory as of 08/30/21
TNMCorps Mapping Challenge: Schools in CO NoHistory as of 08/30/21
TNMCorps Mapping Challenge: Schools in CO NoHistory as of 08/30/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/29/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/29/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/29/21
TNMCorps Mapping Challenge: City/Town Halls in IA, MN as of 08/05/21
A before-and-after image showing the change in edits between 7/29/21 and 8/05/21. Volunteers edited almost 20 points during this timeframe.
A before-and-after image showing the change in edits between 7/29/21 and 8/05/21. Volunteers edited almost 20 points during this timeframe.
TNMCorps Mapping Challenge: Law Enforcement in KS & OK as of 08/05/21
A before-and-after image showing the change in edits between 7/29/21 and 8/05/21. Volunteers edited almost 20 points during this timeframe.
A before-and-after image showing the change in edits between 7/29/21 and 8/05/21. Volunteers edited almost 20 points during this timeframe.
TNMCorps Mapping Challenge: Schools in CO NoHistory as of 08/05/21
A before-and-after image showing the change in edits between 7/29/21 and 8/05/21. Volunteers edited over 400 points during this timeframe (public domain).
A before-and-after image showing the change in edits between 7/29/21 and 8/05/21. Volunteers edited over 400 points during this timeframe (public domain).
TNMCorps Mapping Challenge: Schools in CO NoHistory as of 08/19/21
A before-and-after image showing the change in edits between 8/05/21 and 8/19/21. Volunteers edited over 800 points during this timeframe (public domain).
A before-and-after image showing the change in edits between 8/05/21 and 8/19/21. Volunteers edited over 800 points during this timeframe (public domain).
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/08/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/08/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/08/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/15/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/15/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/15/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/22/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/22/21
TNMCorps Mapping Challenge: City/Town Halls in AK as of 07/22/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/08/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/08/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/08/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/15/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/15/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/15/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/22/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/22/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/22/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/29/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/29/21
TNMCorps Mapping Challenge: Fire Stations in MS as of 07/29/21
Spring Grove Weir Removal
Before and after removal of a weir located in Codorus Creek at Spring Grove, Pennsylvania.
Before and after removal of a weir located in Codorus Creek at Spring Grove, Pennsylvania.