The NASA Earth Observatory has a page on the retreat of the Columbia Glacier in Alaska:
https://earthobservatory.nasa.gov/Features/WorldOfChange/columbia_glacier.php All the false color NASA images in the series are downloadable [1], Or you can go to the USGS options for Landsat download [2] if you want source images. You can also view a true color 36-year time lapse on Google Earth Engine here: https://earthengine.google.com/timelapse/#v=61.05155,-147.08207,8.644,latLng&t=2.33 good luck! [1] https://earthobservatory.nasa.gov/Features/WorldOfChange/columbia_glacier.php?all=y [2] https://landsat.usgs.gov/landsat-data-access On Sat, Apr 15, 2017 at 3:12 PM, Clifford Snow <cliff...@snowandsnow.us> wrote: > Not sure if talk-us is the best place to ask. We don't use raster data for > much more than background tracing. The only suggestion I have is to look at > Landviewer [1] for areas you know that have been reported as having climate > changes impacts and compare years. Landsat will go back a number of years. > If you want to get more sophisticated, use QGIS to compare vegetation from > then to now using the semi-automatic classification plugin. > > Or just visit any lake in Northern Minnesota and ask the locals. 😊 I've > spent many summers on Gull Lake. > > [1] https://lv.eosda.com > > Best, > Clifford > > > On Sat, Apr 15, 2017 at 5:45 AM, moira walsh <moirawal...@gmail.com> > wrote: > >> >> I'm looking for before and after rasters documenting climate >> change-anywhere. >> If anyone can point me in the right direction, I'd really appreciate it. >> Thank you! >> >> -- >> >> >> >> >> >> >> Moira Walsh MPH >> www.waterinanutshell.net >> 507 210 6420 <(507)%20210-6420> Texts are O.K. >> >> >> >> _______________________________________________ >> Talk-us mailing list >> Talk-us@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/talk-us >> >> > > > -- > @osm_seattle > osm_seattle.snowandsnow.us > OpenStreetMap: Maps with a human touch > > _______________________________________________ > Talk-us mailing list > Talk-us@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-us > >
_______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-us