{97502339-ee5e-4937-994a-1ae638481f2b} 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 - Washington, DC - Park Access by Block Group 2019-04-29 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 shows the block group population that is within and beyond an easy walking distance (500m) of a park entrance. Park entrances were included in this analysis if they were within 5km of the EnviroAtlas community boundary. 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 data is to show the block group population with and without service of a park. This data can be assessed with other socio-economic factors to identify areas of need. 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 Census Block Groups Communities Ecosystem Services EnviroAtlas Environment Environmental Atlas Human Well-being Recreation theme EnviroAtlas Washington, DC District of Columbia 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 -77.86109 -76.68178 38.3645 39.42125 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. The attributes describe the population and percentage of the block group population that are within walking distance (500 meters) of a park entrance. The processing steps were completed using Python scripts. A comprehensive list of metric creation steps is included in the Processing Steps. When calculating the EnviroAtlas Dasymetric Population Map, people are not allocated to certain land cover types or areas with steep slopes. In Washington, however these issues were not apparent. All percentages were calculated using the total dasymetric population per block group, rather than the census population for accuracy's sake. IWDP = In Walking Distance of a Park entrance BWDP = Beyond Walking Distance of a Park entrance 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//WDC_metrics_Oct2019_CSV_Shapes.zip download Download The URL providing direct access to the downloadable dataset. download https://enviroatlas.epa.gov/download//WDC_metrics_Oct2019_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 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://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 Esri 2011 Data and Maps Parks Layer, 2011 NavTeq Parks Layer, and Trust For Public Lands ParkServe data, clipped to the 5km border of the EnviroAtlas community boundary. Using online parks and recreation departments for municipalities, counties, and states, hand digitize any missing parks. 2019-04-26T00:00:00 From the 2011 NavTeq Streets, limit streets to walkable roads: FUNC_CLASS < 2; SPEED_CAT < 3; AR_PEDEST = 'Y'. 2017-01-01T00:00:00 Clip NavTeq Streets to the 5km border of the EnviroAtlas community boundary. 2019-04-26T00:00:00 Assign entrance locations to each park based on imagery and information from individual parks and recreation departments. For parks that are open to the street, assign entrances every 1,000m as well as at all intersections along the park edge. 2019-04-26T00:00:00 Convert roads to 10m raster, snapped to EnviroAtlas Dasymetric (2011/October 2015). 2019-04-29T00:00:00 Run Cost Distance tool with the entrance points as the source data and the rasterized roads as the cost raster. 2019-04-29T00:00:00 Reclassify distance raster into groups of 0-500m and above 500m. 2019-04-29T00:00:00 Convert the reclassified raster into polygons. 2019-04-29T00:00:00 Select by attributes the polygons for the distance group representing 0-500 meters. 2019-04-29T00:00:00 Clip the walkable roads layer to the selected records in the polygon layer. 2019-04-29T00:00:00 Buffer the new road segments by 60m. 2019-04-29T00:00:00 Convert the buffer into a raster. 2019-04-29T00:00:00 Extract by Mask the EnviroAtlas dasymetrics (2011/October 2015) within the rasterized 60m buffer. 2019-04-29T00:00:00 Calculate Zonal Statistics as a Table on the extracted daysmetics with the zones being the 2010 block groups within the EnviroAtlas community boundary. 2019-04-29T00:00:00 Calculate Zonal Statistics as a Table for the EnviroAtlas Dasymetrics (2011/October 2015) with the zones being the 2010 block groups within the EnviroAtlas community boundary. Add resulting population sums to the community block groups as attribute Dasy_Pop. 2019-04-08T00:00:00 Create a new table based on the EnviroAtlas community block groups table retaining the BGRP and Dasy_Pop fields. 2019-04-29T00:00:00 Add fields to the new table for IWDP_Pop (Long), BWDP_Pop (Long), IWDP_Pct (Float), BWDP_Pct (Float). 2019-04-29T00:00:00 Join the results of the zonal statistics with the new table. 2019-04-29T00:00:00 Calculate field: IWDP_POP = [zonal statistics results].SUM; remove join. 2019-04-29T00:00:00 Calculate fields: BWDP_Pop = Dasy_Pop - IWDP_Pop; IWDP_Pct = IWDP_Pop/Dasy_Pop*100; BWDP_Pct = BWDP_Pop/Dasy_Pop*100. Limit _Pct values to 2 decimal points. 2019-04-29T00:00:00 Calculate fields where Dasy_Pop = 0: All Fields = -99999. 2019-04-29T00:00:00 Export the fields to be displayed in the EnviroAtlas to a final gdb table. IWDP_Pop, BWDP_Pop, IWDP_Pct, BWDP_Pct. 2019-04-29T00:00:00 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