Layers display county-level information about the number and rate of physicians based on data from the Health Resources and Services Administration (HRSA) 2015-16 Area Health Resource File (AHRF).
National Hydrography Dataset (Flowline)
The National Hydrography Dataset (NHD) is used to portray surface water. The NHD represents the drainage network with features such as rivers, streams, canals, lakes, ponds, coastline, etc. The principal components of the NHD are:
- NHDFlowline: This is the fundamental flow network consisting predominantly of stream/river and artificial path vector features. It represents the spatial geometry, carries the attributes, models the water flow, and contains linear referencing measures for locating events on the network. Additional NHDFlowline features are canal/ditch, pipeline, connector, underground conduit, and coastline.
- NHDArea: This feature class contains many additional features of water polygons. One of the more important is the stream/river feature. It represents the aerial extent of the water in a wide stream/river with a basic set of attributes. They typically contain NHDFlowline artificial paths that are used to model the stream/river. Artificial path carries the critical attributes of the stream/river, whereas NHDArea represents the geometric extent.
- NHDWaterbody: Basic waterbodies such as lake/pond features are represented here. They portray the spatial geometry and the attributes of the feature. These water polygons may contain NHDFlowline artificial paths to allow the representation of water flow. Other NHDWaterbody features are swamp/marsh, reservoir, playa, estuary, and ice mass.
County Health Rankings, 2017
Data and maps from the 2017 County Health Rankings are now available on Community Commons! Click the map below to view the rank and underlying data for Premature Death, or search for additional updates by searching the Map Room for the term “CHR 2017”.
Percentage of Students Eligible for Free or Reduced Price Lunch by School
This layer displays information about free and reduced price lunch eligibility among public school students. This point-level data is acquired from the 2015-2016 National Center for Education Statistics (NCES) Common Core of Data (CCD) Public School Universe Survey dataset.
Life Expectancy and Change in Life Expectancy by County, 1985-2014
This layer displays average life expectancy at birth and change in life expectancy between 1985 and 2014 by county.
500 Cities Project Data by City and Census Tract, 2015
Map data topics include preventative health, risk behaviors, and clinical care. Estimates from the 500 Cities Project are available at the state, city, and census tract level. Data representing year 2015 were released in December, 2017. For more map layers from this series, search the Map Room for the terms 500 Cities.
Mortality Risk and Change in Mortality Risk by County, 1985-2014
This layer displays mortality risk (percentage) and change in mortality risk by county for the population aged 45-65. Other layers from this dataset display life expectancy at birth and mortality risk for the population under age 5 and for 20-year age groups at the county level for each state, the District of Columbia, and the United States, as well as the changes in life expectancy and mortality risk for each location between 1985 and 2014.
Air Quality – Fine Particulate Matter (PM2.5) by Census Tract, 2014
This layer displays the daily average concentration of fine particulate matter and the percentage of days with concentrations of fine particulate matter above the National Ambient Air Quality Standard (NAAQS) of 35.0 micrograms per cubic meter in 2014.
Multi-Family Assisted Housing
Layer displays the approximate locations of Multifamily Assisted Housing properties that are monitored by the US Department of Housing and Urban Development (HUD). The three largest assistance programs for Multifamily housing are Section 8 (Project Based Assistance), Section 202 (Supportive Housing for the Elderly), and Section 811 (Supportive Housing for Persons with Disabilities).
Air Quality – Ozone Levels (O3) by Census Tract, 2014
This layer displays the daily average concentration of ozone and the percentage of days with concentrations of ozone above the National Ambient Air Quality Standard (NAAQS) of 0.075 parts per million in 2014.