This indicator displays changes in the number of days with unusually (>95th percentile) cold temperatures in the contiguous 48 United States. Indicator data are acquired from the EPA’s Climate Change Indicators in the United States, Fourth Edition, published in 2016.
Hydrography – Waterbodies
Hydrography depicts surface water, including rivers and streams, lakes and ponds, canals, coastlines, and many other water features. The Hydrography layer combines two data sets: the 2014 National Map Hydrographic Geodatabase (1:1,000,000 scale) for small to medium scales, and the 2016 National Hydrography Datataset (NHD) (1:24,000 scale) for large scale mapping. Hydrography is depicted in two layers. Rivers & Streams depicts linear hydrography, including rivers, streams, canals, pipes, and artificial paths (line networks through larger water bodies). Waterbodies depicts area hydrography, including larger rivers, lakes, ponds, seas, bays, estuaries, etc.
EPA Climate Change Indicators – Change in Surface Temperatures
This indicator describes trends in average surface temperature for the United States. Indicator data are acquired from the EPA’s Climate Change Indicators in the United States, Fourth Edition, published in 2016.
EPA Climate Change Indicators – Change in Snowfall
This indicator examines changes in total snowfall in the contiguous 48 United States. Indicator data are acquired from the EPA’s Climate Change Indicators in the United States, Fourth Edition, published in 2016.
EPA Climate Change Indicators – Change in River Flooding
This indicator examines changes in the size and frequency of inland river flood events in the United States. Indicator data are acquired from the EPA’s Climate Change Indicators in the United States, Fourth Edition, published in 2016.
On-Time Graduation Rates, 2014-15
This layer displays information about the adjusted four-year cohort graduation rate for school-districts and counties in the United States.
Access to SNAP-Authorized Retailers
This layer displays the number and rate of SNAP-authorized retailers in each census tract and county. Locations of retailers are based on the December 22, 2017 USDA directory of SNAP-authorized retailers.
Net Migration by County, 2000 to 2010
This layer displays the net migration rate for United States counties between 2000 and 2010. Net migration is the balance of immigration and emigration over a given time period. Net migration does not include natural change, or change due to births and deaths.
Farmer’s Markets Accepting SNAP Benefits
This layer displays the locations of farmer’s markets across the United States that accept EBT / SNAP benefits. Data is current as of December 22, 2017.
Net Migration of Young Adults by County, 2000 to 2010
This layer displays the net migration rate for young adults (age 20 – 39) in United States counties between 2000 and 2010. Net migration is the balance of immigration and emigration over a given time period. Net migration does not include natural change, or change due to births and deaths. It is important to understand the migration patterns of young adults as their geographic patterns will impact the economy and shape the future workforce.