adding dates that should have been added in first upload
annotating all glaciers < 100000 m^2 as dead_ice
adding more_info and pointing to USGS site on glaciers in Glacier National Park
more date, some name adjustments
more date, some name adjustments
more date, some name adjustments
standardizing tags and start & end_dates
standardizing tags and start & end_dates
standardizing tags and start & end_dates
adding `start_date=1915` to all nhd data that is included in glacier series that have 1850 outlines
tuning up some 1850 glaciers that are now `glacier=dead_ice`