{3F2450A1-F022-4769-B5BD-07E160DC981D} eng; USA utf8 dataset EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas ORD/NERL/EnviroAtlas (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov pointOfContact 2025-02-13 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) EnviroAtlas - Durham, NC - Near Road Tree Buffer 2015-05-19 publication U.S. EPA Office of Research & Development (ORD) - National Exposure Research Laboratory (NERL) Research Triangle Park NC publisher US Environmental Protection Agency (US EPA) originator This EnviroAtlas dataset addresses the tree buffer along heavily traveled roads. The roads are interstates, arterials, and collectors within the EnviroAtlas community boundary. Forest is defined as Trees & Forest. Sufficient tree bufferage is defined as 25% coverage within the circular moving window with a radius of 14.5m at any given point along the roadway. There are potential negative health effects for those living in a location without a sufficient tree buffer. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas ) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets ). The purpose of this dataset is to identify areas that could benefit from additional tree buffers. The overall goal of EnviroAtlas is to employ and develop the best available science to map indicators of ecosystem services production, demand, and drivers for the nation. completed EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas ORD/NERL/EnviroAtlas (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov pointOfContact asNeeded Ecosystem Environment theme EPA GIS Keyword Thesaurus Air Communities Ecosystem Services EnviroAtlas Environment Environmental Atlas Health Human Well-being Land Cover Transportation Trees theme EnviroAtlas North Carolina Durham, NC place None https://edg.epa.gov/EPA_Data_License.htm otherRestrictions Use Constraints: None. Please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated. otherRestrictions Access Constraints: None. PUBLIC https://project-open-data.github.io/schema/#accessLevel Standard Technical Controls eng; USA environment -79.134618 -78.788325 35.844552 36.133857 2010-01-01 2011-01-01 true Entity and Attribute Information Entity and Attribute Overview: For more information about EnviroAtlas data, go to https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets. This dataset shows the percent of tree cover within 26m of a road edge summarized in 5 percentage classes, measured using a circular moving window with a radius of 14.5m, located 11.5m from a road edge, overlapping the road by 3m where the edges are correct. Processing steps were completed using Python scripts. A comprehensive list of metric creation steps is included in the Processing Steps. Entity and Attribute Detail Citation: https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas ORD/NERL/EnviroAtlas (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov distributor https://enviroatlas.epa.gov/download/DNC_metrics_Apr2020_CSV_Shapes.zip download Download The URL providing direct access to the downloadable dataset. download https://enviroatlas.epa.gov/download/DNC_metrics_Apr2020_FGDB.zip ESRI:ArcGIS API The endpoint of a web service to access the dataset (REST endpoint, WMS GetCapabilities URL, or a SOAP WSDL endpoint). webMapService https://enviroatlas.epa.gov/arcgis/rest/services/Supplemental/NrRd_PFor_AllCommunities/MapServer information Documentation URL for accessing related documents such as data dictionary, technical information about a dataset, developer documentation, etc. information https://www.epa.gov/enviroatlas/enviroatlas-data information Home Page Alternative landing page used to redirect user to a contextual, Agency-hosted "homepage" for the Dataset or API information dataset Horizontal Positional Accuracy Report Data were collected using methods that have unknown accuracy (EPA National Geospatial Data Policy [NGDP] Accuracy Tier 10). For more information, please see EPA's NGDP at https://www.epa.gov/geospatial/geospatial-policies-and-standards Features represented have not been tested for completeness Features represented have not been tested for completeness Tests for integrity have not been performed. This lineage was generated by the FGDC CSDGM to 19139 transformation Begin with 2011 NavTeq Streets Layer and 1-Meter Land Cover Classification for the EnviroAtlas community created by the US EPA EnviroAtlas Team. 2015-04-28T00:00:00 Project NavTeq Streets layer into UTM. 2015-04-28T00:00:00 Clip NavTeq Streets Layer to 1-km Buffer of the EnviroAtlas community boundary. 2015-04-28T00:00:00 Extract roads from NavTeq Streets where Func_Class = 1-4 to a new layer. 2015-04-28T00:00:00 Add Field to the new streets layer: LANES (double) and calculate where LANES = TO_LANES + FROM_LANES 2015-04-28T00:00:00 For any records where LANES = 0, use Esri Aerial basemap to fill in correct lane value. 2015-04-28T00:00:00 Add Field to streets layer: HALFWIDTH (double) and calculate where HALFWIDTH = LANES * 3.6576 / 2. 2015-04-28T00:00:00 Buffer streets using the value in HALFWIDTH with options FULL, FLAT, ALL. 2015-04-28T00:00:00 Rebuffer the buffered streets by 11.5 meters with options FULL, FLAT, ALL. 2015-04-28T00:00:00 Convert the resulting polygons into polylines -- referred to as analysis lines. 2015-04-28T00:00:00 Delete analysis lines that are unnecessary for analysis, for example, lines in between two lanes of a divided highway and lines on the interior of a freeway ramp. 2015-04-28T00:00:00 Reclassify the Land Cover into Binary Forest. (Trees & Forest - 40 = 1; All Else = 0) 2015-04-28T00:00:00 Run Focal Statistics on the Forest Binary Raster with a circular cell neighborhood with a radius of 14.5m in map units. 2015-04-28T00:00:00 Extract the Focal Statistics using the analysis lines. 2015-04-28T00:00:00 Reclassify the extracted raster into percentage classes: 0-77 = 12.5; 78-154 = 25; 155-307 = 50; 308-460 = 75; 461-613 = 100. 2015-04-28T00:00:00 Convert the reclassified raster into a polygon WITHOUT simplifying. 2015-04-28T00:00:00 Intersect the analysis line with the polygons, splitting the analysis line into pieces representing each percentage class. 2015-04-28T00:00:00 Clip the analysis line to the EnviroAtlas community boundary and the county lines. 2015-04-28T00:00:00 Dissolve the analysis line based on the percentage classes. 2015-04-28T00:00:00 Add field to the analysis line: PctTree (float) and calculate where PctTree = gridcode 2015-04-28T00:00:00 Project the analysis line into Albers 2015-04-28T00:00:00 Export the analysis line to a geodatabase for display in EnviroAtlas. 2015-04-28T00:00:00 unknown 2029-02-13 This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2024-02-09T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas ORD/NERL/EnviroAtlas (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov pointOfContact