{0D3E33D1-81C5-456E-A581-58049701ACED} eng; USA utf8 dataset EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact 2025-02-13 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) EnviroAtlas - Fresno, CA - Estimated Intersection Density of Walkable Roads 2019-06-19 publication U.S. EPA Office of Research and Development (ORD) - National Exposure Research Laboratory (NERL) Research Triangle Park NC publisher U.S. Environmental Protection Agency (US EPA) originator This EnviroAtlas dataset estimates the intersection density of walkable roads within a 750 meter radius of any given 10 meter pixel in the community. Intersections are defined as any point where 3 or more roads meet and density is calculated using kernel density, where closer intersections are weighted higher than further intersections. Intersection density is highly correlated with walking for transportation. 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 display intersection density, a key aspect of walkability, within the study area. 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 Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact asNeeded Ecosystem Environment theme EPA GIS Keyword Thesaurus Communities Ecosystem Services EnviroAtlas Environment Environmental Atlas Health Human Well-being Transportation theme EnviroAtlas Fresno, CA California place None https://edg.epa.gov/EPA_Data_License.html otherRestrictions Use Constraints: None. Please check sources, scale, accuracy, currency 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 health transportation -119.98725 -119.50730 36.616154 36.968864 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. In this dataset, the kernel density of intersections of walkable roads is displayed. The intersections displayed is not the number of intersections per square kilometer, but rather a number representing the accessibility of intersections at a given point. This dataset can be used by researchers, communities, and decision-makers to represent one aspect of walkability. Processing steps were completed using Python scripts and some manual data management. 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 Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas distributor https://enviroatlas.epa.gov/download/FCA_IntDen_tif.zip download Download The URL providing direct access to the downloadable dataset. download https://enviroatlas.epa.gov/arcgis/rest/services 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://www.epa.gov/enviroatlas/enviroatlas-data 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 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://epa.gov/geospatial/policies.html 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 the 2011 NavTeq Streets layer. 2017-01-01T00:00:00 Limit streets to walkable roads. Remove high volume/maximum speed roads (FUNC_CLASS < 2), high speed roads (SPEED_CAT < 3 AND > 7), and only use roads that allow pedestrian access (AR_PEDEST = 'Y'). 2017-01-01T00:00:00 Convert multipart roads to single part roads. 2017-01-01T00:00:00 Use the 2011 NavTeq LandUseA and LandUseB to identify road segments within airports, amusement parks, beaches, cemeteries, hospitals, industrial complexes, military bases, railyards, shopping centers, and golf course. Remove these roads if they have no street name value (ST_NAME). 2017-01-01T00:00:00 Calculate new variable in the road layer for the direction of travel (0 for two ways, 1 for one way): Clps_Fld (SHORT) = 0 if DIR_TRAVEL=B, otherwise = 1 2017-01-01T00:00:00 Clip the National Intersection Density Roads layer to the 5km buffer of the EnviroAtlas community. 2019-06-19T00:00:00 Project the clipped roads into Albers. 2019-06-19T00:00:00 Merge divided roads into one centered segment. 2019-06-19T00:00:00 Unsplit roads by street name. 2019-06-19T00:00:00 Create intersection points by intersecting the roads with themselves with output = point. 2019-06-19T00:00:00 Delete identical points. 2019-06-19T00:00:00 Use the spatial analyst kernel density tool with a cell size of 10m, search radius of 750m and scale factor of square kilometers. 2019-06-19T00:00:00 Clip the raster to the community boundary and convert 0 values to No Data. 2019-06-19T00:00:00 Convert the raster to TIFF format for use in EnviroAtlas. 2019-06-19T00:00:00 Reclassify the raster into qualitative breaks. 2019-06-19T00:00:00 Convert the Reclassified Raster into a Polygon. 2019-06-19T00:00:00 Clip the polygons to the EnviroAtlas Community Boundary 2019-06-19T00:00:00 Copy the feature class to the final geodatabase. 2019-06-19T00:00:00 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 Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact