EPA Environmental Dataset Gateway


Open/Close section Identification Information
Title: EnviroAtlas -- Fresno, California -- Meter-Scale Urban Land Cover (MULC) Data (2010)
Abstract: The Fresno, CA EnviroAtlas Meter-Scale Urban Land Cover (MULC) Data were generated via supervised classification of combined aerial photography and LiDAR data. The air photos were United States Department of Agriculture (USDA) National Agricultural Imagery Program (NAIP) four band (red, green, blue, and near infrared) aerial photography at 1-m spatial resolution. Aerial photography ('imagery') was collected on multiple dates in summer 2010. Seven land cover classes were mapped: Water, impervious surfaces (Impervious), soil and barren (Soil), trees and forest (Tree), and grass and herbaceous non-woody vegetation (Grass), agriculture (Ag), and Orchards. An accuracy assessment of 500 completely random and 103 stratified random points yielded an overall user's accuracy (MAX) of 81.1 percent and a fuzzy user's accuracy (RIGHT) of 86.9 (see below). The area mapped is defined by the US Census Bureau's 2010 Urban Statistical Area for Fresno, CA plus a 1-km 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).
Purpose: The purpose of the land cover (LC) data is to provide a detailed snapshot of the urban environment and ecosystem for analysis of multiple human and ecosystem health metrics and services. In EnviroAtlas, this analysis is typically performed by U.S. Census block group. Land cover maps are integral to sound, scientific decision making and effective stewardship. A high-resolution urban land cover (LC) map quantitatively and qualitatively represents the physical environment and ecosystem matrix of a city. Land cover varies at a fine spatial scale in urban environments, and the existing NLCD (National Land Cover Database, www.mrlc.gov) LC maps at 30 m spatial resolution are too coarse to measure many urban phenomena. There are many possible applications of these high-resolution urban LC data, for example: - Knowing the exact location and size of vegetated and non-vegetated spaces; - Identifying highly impervious areas that would most benefit from trees and other vegetation to mitigate surface runoff and urban heat island effects; - Measuring the width and character of urban riparian buffers; - Locating potential wildlife corridors, gaps and linkages; - Planning park development and street trees for maximum benefits. 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.
Open/Close section Distribution Information
Resource(Server) URL: https://enviroatlas.epa.gov/arcgis/rest/services/Supplemental/Landcover_AllCommunities/ImageServer
Download URL: https://edg.epa.gov/data/PUBLIC/ORD/ENVIROATLAS/Communities/FresnoCA
Reference URL: https://www.epa.gov/enviroatlas/enviroatlas-data
Website URL: https://www.epa.gov/enviroatlas
Open/Close section Time Period of Content
Publication Date: 20170905
Progress: Completed
Frequency: As needed
Open/Close section Multiple Date
Date: 2010
Date: 2012
Currentness: Ground condition
Open/Close section Spatial Domain
West Bounding Longitude: -119.987249
East Bounding Longitude: -119.507299
North Bounding Latitude: 36.968864
South Bounding Latitude: 36.616154
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Open/Close section Constraints
License https://edg.epa.gov/EPA_Data_License.html
Access: None
Use: 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.
Open/Close section Theme Keywords
Theme Topics: Environment and Conservation, Geological and Geophysical, Imagery and Base Maps
Open/Close section Contact Information
Originator: US Environmental Protection Agency (US EPA)
Email: EnviroAtlas@epa.gov
Address Type: mailing and physical address
City: Research Triangle Park
State: NC
Postal Code: 27709
Telephone: (919) 541-3832
Open/Close section Metadata Reference Information
File Identifier: {87041CF3-05BC-43C3-82DA-F066267C9871}
Metadata Date Stamp: 2017-09-05
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998