20171114131255001.0TRUE<p style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:"Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 1.5rem; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><span style='border:0px solid currentcolor; box-sizing:border-box; display:inline !important; float:none; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; line-height:1.5; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>This is a component of the Proctor Creek Watershed Story Map: The Intersection of Green Infrastructure and Health Collection. This map identifies areas in the Proctor Creek watershed that are most likely to experience urban heat island effects; details of the analysis are below<span style='border:0px solid currentcolor; box-sizing:border-box; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; line-height:1.5; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>.<span style='border:0px solid currentcolor; box-sizing:border-box; display:inline !important; float:none; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; line-height:1.5; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'> Please launch the main application for more information.<p style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:"Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 1.5rem; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>This analysis, based on a publication by GreenLaw (2012),* produced a grid showing where heat islands are most likely to occur in the Proctor Creek watershed. First, spatial data were gathered and/or generated for metrics (i.e., canopy cover, impervious surfaces, parks and cemeteries, parcels with air conditioning, Normalized Difference Vegetation Index (NDVI), and land surface temperature) that may correlate with or compound health or environmental outcomes associated with flooding. Secondly, a neutral grid of evenly sized squares was created in ArcGIS and overlaid on the study area; the presence of each metric was measured within each cell (percent area or mean value). Next, to normalize the data values, the summed values were classified into five equal quantiles, with values of 1 to 5, each containing about 20% of the total counts. The quantiles were summed and then classified into new quantiles, which were displayed in grids using a color gradient from light (quantile 1) to dark (quantile 5). If the metric is conversely proportional to the outcome–-for example, higher Normalized Difference Vegetation Index (NDVI) values are inversely related to urban heat island occurrence, then the quantile values were reversed. The grid cells with the highest quantile values (e.g., quantiles 5 and 4) are most likely to experience heat island effects and thus may benefit from green infrastructure practices, where appropriate. <p style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:"Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 1.5rem; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>*GreenLaw. (2012). The Patterns of Pollution: A Report on the Demographics of Pollution in Metro Atlanta.Urban Heat IslandProctor CreekExtreme Heat EventsAtlantaA polygon grid based on various metrics examined for the Proctor Creek Watershed Story Map to help identify areas in the watershed that are most likely to experience urban heat island effects.Modified from GreenLaw. (2012). The Patterns of Pollution: A Report on the Demographics of Pollution in Metro Atlanta.<p style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 1.5rem 0.25in; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><span style='background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px solid currentcolor; box-sizing:border-box; line-height:1.5;'>This content item is licensed under the US EPA Data Licensing Agreement for public use.<p style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 1.5rem 0.25in; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><a style='border:0px solid currentcolor; box-sizing:border-box; color:rgb(0, 97, 155); font-family:inherit; line-height:1.5; text-decoration:none;' target='_blank' href='https://edg.epa.gov/EPA_Data_License.html' rel='nofollow ugc noopener noreferrer'>License Summary</a>  |  <a style='border:0px solid currentcolor; box-sizing:border-box; color:rgb(0, 97, 155); font-family:inherit; line-height:1.5; text-decoration:none;' target='_blank' href='https://www.epa.gov/web-policies-and-procedures/epa-disclaimers#geospatial' rel='nofollow ugc noopener noreferrer'>Terms of Use</a>