NA_CEC_Eco_Level3

Data format: Shapefile

File or table name: NA_EcoRegion_Level3

Coordinate system: Geographic

Theme keywords: biota, boundaries, environment, location, Biology, Conservation, Ecology, Ecosystem, Land, Natural Resources, US Ecoregion Levels III and IV, North American (CEC) Ecoregion Levels I, II, III

Abstract: Ecological regions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across international, national, province and state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas. A Roman numeral hierarchical scheme has been adopted for different levels for ecological regions. Level I is the coarsest level, dividing North America into 15 ecological regions. Level II divides the continent into 50 regions. At Level III, there are currently 181 ecological regions for North America. These files of Level I ecological regions of North America are a 2010 update and revision of files developed by Canada, the United States, and Mexico in 2006, which were an update of earlier files from the late 1990's in a cooperative project for the Commission for Environmental Cooperation (CEC 1997). The CEC was created under the North American Agreement on Environmental Cooperation (NAAEC) to address regional environmental concerns, help prevent potential trade and environmental conflicts and promote the effective enforcement of environmental law. The Agreement complements the environmental provisions established in the North American Free Trade Agreement (NAFTA). The 2006 version of North American ecological regions was developed in a meeting between representatives of the three nations in April 2006 in Newport, Oregon. This 2010 version updates mainly the United States ecoregions in those states where new ecoregion mapping has occurred since 2006, particularly in Michigan, New York, and New England. Issues relating to topology (overlaps and gaps in the data) and to waterbodies were the only revisions for Canada and Mexico. Many small waterbodies in Mexico and in coastal areas of the United States were merged with surrounding ecoregions to conform with their depiction in the interior United States and Canada. The 2010 files are considered draft and subject to further refinements.Commission for Environmental Cooperation. 1997. Ecological regions of North America: toward a common perspective. Commission for Environmental Cooperation, Montreal, Quebec, Canada. 71pp. U.S. Environmental Protection Agency, 2010, Level III ecoregions of the continental United States (revision of Omernik, 1987): Corvallis, Oregon, USEPA National Health and Environmental Effects Research Laboratory, Map M-1, various scales. Comments and questions regarding the North America Ecoregions should be addressed to Glenn Griffith, Dynamac Corporation, c/o US EPA., 200 SW 35th Street, Corvallis, OR 97333, (541)-754-4465, email:griffith.glenn@epa.gov. Alternate: James Omernik, USGS, c/o US EPA, 200 SW 35th Street, Corvallis, OR 97333, (541)-754-4458, email:omernik.james@epa.gov

FGDC and ESRI Metadata:

Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.

Identification Information:


Citation:
Citation information:
Originators: U.S. Environmental Protection Agency


Title:
NA_CEC_Eco_Level3
*File or table name: NA_EcoRegion_Level3


Publication date: 20100501
Geospatial data presentation form: vector digital data


Series information:

Publication information:
Publication place: Corvallis, OR
Publisher: U.S. EPA Office of Research & Development (ORD) - National Health and Environmental Effects Research Laboratory (NHEERL)

Online linkage: ftp://ftp.epa.gov/wed/ecoregions/cec_na/NA_CEC_Eco_Level3.zip
Online linkage: http://www.epa.gov/wed/pages/ecoregions.htm


Larger work citation:
Citation information:
Title:


Publication date:


Series information:

Publication information:

Description:
Abstract:
Ecological regions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across international, national, province and state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas.

A Roman numeral hierarchical scheme has been adopted for different levels for ecological regions. Level I is the coarsest level, dividing North America into 15 ecological regions. Level II divides the continent into 50 regions. At Level III, there are currently 181 ecological regions for North America.

These files of Level I ecological regions of North America are a 2010 update and revision of files developed by Canada, the United States, and Mexico in  2006, which were an update of earlier files from the late 1990's in a cooperative project for the Commission for Environmental Cooperation (CEC 1997). The CEC was created under the North American Agreement on Environmental Cooperation (NAAEC) to address regional environmental concerns, help prevent potential trade and environmental conflicts and promote the effective enforcement of environmental law. The Agreement complements the environmental provisions established in the North American Free Trade Agreement (NAFTA).

The 2006 version of North American ecological regions was developed in a meeting between representatives of the three nations in April 2006 in Newport, Oregon. This 2010 version updates mainly the United States ecoregions in those states where new ecoregion mapping has occurred since 2006, particularly in Michigan, New York, and New England. Issues relating to topology (overlaps and gaps in the data) and to waterbodies were the only revisions for Canada and Mexico. Many small waterbodies in Mexico and in coastal areas of the United States were merged with surrounding ecoregions to conform with their depiction in the interior United States and Canada. The 2010 files are considered draft and subject to further refinements.Commission for Environmental Cooperation. 1997. Ecological regions of North America: toward a common perspective. Commission for Environmental Cooperation, Montreal, Quebec, Canada. 71pp.

 U.S. Environmental Protection Agency, 2010, Level III ecoregions of the continental United States (revision of Omernik, 1987): Corvallis, Oregon, USEPA National Health and Environmental Effects Research Laboratory, Map M-1, various scales.

Comments and questions regarding the North America Ecoregions should be addressed to Glenn Griffith, Dynamac Corporation, c/o US EPA., 200 SW 35th Street, Corvallis, OR 97333, (541)-754-4465, email:griffith.glenn@epa.gov.  Alternate: James Omernik, USGS, c/o US EPA, 200 SW 35th Street, Corvallis, OR 97333, (541)-754-4458, email:omernik.james@epa.gov

Purpose:
Ecoregion maps assist managers of aquatic and terrestrial resources to understand the regional patterns of the realistically attainable quality of these resources

Supplemental information:
Electronic versions of ecoregion maps and posters, as well as other ecoregion resources are available at: http://www.epa.gov/wed/pages/ecoregions.htm.
      Symbology layers for US Levels III and IV also available.
      Level IV ecoregions are not complete for California and Arizona, as of May, 2010.  For these states, the polygons are for Level III or lower. The field "US_L4CODE" contains placeholder information derived from "US_L3CODE".  Ecoregions were digitized at 1:250,000 scale and are intended for large geographic extents (i.e. states, multiple counties, or river basins).  Use for smaller areas, such as individual counties or a 1:24,000 scale map boundary, is not recommended.

*Language of dataset: en


Time period of content:
Time period information:
Single date/time:
Calendar date: 20100501

Currentness reference:
Publication date

Status:
Progress: Ongoing
Maintenance and update frequency: As needed

Spatial domain:
Bounding coordinates:
West bounding coordinate: -180.000000
East bounding coordinate: 180.000000
North bounding coordinate: 84.132635
South bounding coordinate: 6.630919

Local bounding coordinates:
*Left bounding coordinate: -179.130734
*Right bounding coordinate: -52.661775
*Top bounding coordinate: 83.110448
*Bottom bounding coordinate: 14.515827

Keywords:
Theme:
Theme keywords: biota, boundaries, environment, location
Theme keyword thesaurus: ISO 19115 Topic Category

Theme:
Theme keywords: Biology, Conservation, Ecology, Ecosystem, Land, Natural Resources
Theme keyword thesaurus: EPA GIS Keyword Thesaurus

Theme:
Theme keywords: US Ecoregion Levels III and IV, North American (CEC) Ecoregion Levels I, II, III
Theme keyword thesaurus: User

Place:
Place keywords: Selected State, Conterminous United States

Place:
Place keywords: United States
Place keyword thesaurus: None

Access constraints: None
Use constraints:
None

Point of contact:
Contact information:
Contact person primary:
Contact person: Marc Weber
Contact organization: U.S. Environmental Protection Agency, Office of Research & Development (ORD) - National Health and Environmental Effects Research Laboratory (NHEERL)
Contact position: GIS Analyst


Contact address:
Address type: mailing and physical address
Address:
200 S.W. 35th St.
City: Corvallis
State or province: OR
Postal code: 97333

Contact voice telephone: (541) 754-4469


Contact electronic mail address: weber.marc@epa.gov


Contact instructions:
http://www.epa.gov/

Security information:
Security classification system: FIPS Pub 199
Security classification: No Confidentiality
Security handling description: Standard Technical Controls

*Native dataset format: Shapefile
Native data set environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000


Cross reference:
Citation information:
Title:
Ecoregions of the United States


Back to Top
Data Quality Information:


Logical consistency report:
Although ecoregion polygons and attributes have been checked for accuracy, some errors may remain.
    Polygons along state borders were reviewed and updated, May 2010.

Completeness report:
Ecoregion development is ongoing in the United States and may be integrated into the North America data in the future.  This pertains mainly to the states of California and Arizona.

Positional accuracy:
Horizontal positional accuracy:
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 http://epa.gov/geospatial/policies.html)

Lineage:
Source information:
Source contribution:
The state borders were derived from the dtl_st.sdc on the ArcGIS DVD provided by ESRI.  It was modified by removing Alaska and Hawaii polygons and all but the State field, adding some coastal islands based on imagery or NHDPlus areas, and restoring topology (removing internal gaps and small overlaps).  The EPA regions were added to this custom geodatabase (dtl_48plyf) prior to the intersection process with the seamless ecoregion data.

Process step:
Process description:
1) U.S.G.S. 1:250,000 topographic maps are used to delineate the ecoregions. The lines drawn are manually digitized or scanned to produce georeferenced electronic files. 2) All base maps are joined together and errors along the edges are resolved. 3) Topology is established and the maps are reviewed for accuracy, completeness, and conformity with the original lines. Corrections are made as needed and topology regenerated. 4) Attributes are added. 5) Maps are plotted for visual inspection by two individuals and necessary changes made.  6) Ecoregions from all available states are merged and dissolved to identify and correct inconsistencies. 7) Polygons of the corrected seamless ecoregion features are extended beyond the coastal borders.  8) State and Ecoregion datasets are intersected. 9) Topology errors removed. 10) Final QA

Process date: 20100526


Process step:
Process description:
Metadata imported.

Process date: 20101129


Process step:
Process description:
Dataset copied.

Process date: 20110926
Process time: 14492100


Source used citation abbreviation:


Back to Top
Spatial Data Organization Information:


Direct spatial reference method: Vector


Point and vector object information:
SDTS terms description:
*Name: NA_EcoRegion_Level3
SDTS point and vector object type: G-polygon
Point and vector object count: 2548

ESRI terms description:
*Name: NA_EcoRegion_Level3
*ESRI feature type: Simple
*ESRI feature geometry: Polygon
*ESRI topology: FALSE
*ESRI feature count: 2548
*Spatial index: TRUE
*Linear referencing: FALSE


Back to Top
Spatial Reference Information:


Horizontal coordinate system definition:
Coordinate system name:
*Geographic coordinate system name: GCS_North_American_1983

Geographic:
*Latitude resolution: 0.000000
*Longitude resolution: 0.000000
*Geographic coordinate units: Decimal degrees

Geodetic model:
Horizontal datum name: D_Sphere_ARC_INFO
Ellipsoid name: Sphere_ARC_INFO
Semi-major axis: 6370997.000000
Denominator of flattening ratio: infinity

Back to Top
Entity and Attribute Information:


Detailed description:
*Name: NA_EcoRegion_Level3


Entity type:
Entity type label: NA_CEC_Eco_Level3
*Entity type type: Feature Class
*Entity type count: 2548

Attribute:
Attribute label: FID
*Attribute alias: FID
Attribute definition:
Internal feature number.
Attribute definition source:
ESRI

*Attribute type: OID
*Attribute width: 4
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Sequential unique whole numbers that are automatically generated.


Attribute:
Attribute label: Shape
*Attribute alias: Shape
Attribute definition:
Feature geometry.
Attribute definition source:
ESRI

*Attribute type: Geometry
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Coordinates defining the features.


Attribute:
Attribute label: NA_L3CODE
*Attribute alias: NA_L3CODE


*Attribute type: String
*Attribute width: 20


Attribute:
Attribute label: NA_L3NAME
*Attribute alias: NA_L3NAME


*Attribute type: String
*Attribute width: 100


Attribute:
Attribute label: NA_L2CODE
*Attribute alias: NA_L2CODE


*Attribute type: String
*Attribute width: 20


Attribute:
Attribute label: NA_L2NAME
*Attribute alias: NA_L2NAME


*Attribute type: String
*Attribute width: 100


Attribute:
Attribute label: NA_L1CODE
*Attribute alias: NA_L1CODE
Attribute definition:
Code for Level I Ecoregion (North America)
Attribute definition source:
CEC

*Attribute type: String
*Attribute width: 20


Attribute:
Attribute label: NA_L1NAME
*Attribute alias: NA_L1NAME
Attribute definition:
Name for Level I Ecoregion (North America)
Attribute definition source:
CEC

*Attribute type: String
*Attribute width: 100


Attribute:
Attribute label: NA_L3KEY
*Attribute alias: NA_L3KEY


*Attribute type: String
*Attribute width: 125


Attribute:
Attribute label: NA_L2KEY
*Attribute alias: NA_L2KEY


*Attribute type: String
*Attribute width: 125


Attribute:
Attribute label: NA_L1KEY
*Attribute alias: NA_L1KEY


*Attribute type: String
*Attribute width: 125


Attribute:
Attribute label: Shape_Leng
*Attribute alias: Shape_Leng


*Attribute type: Float
*Attribute width: 19
*Attribute number of decimals: 11


Attribute:
Attribute label: Shape_Area
*Attribute alias: Shape_Area
Attribute definition:
Area of feature in internal units squared.
Attribute definition source:
ESRI

*Attribute type: Float
*Attribute width: 19
*Attribute number of decimals: 11


Attribute domain values:
Unrepresentable domain:
Positive real numbers that are automatically generated.


Back to Top
Distribution Information:


Distributor:
Contact information:
Contact organization primary:
Contact person: Marc Weber
Contact organization: U.S. Environmental Protection Agency, Office of Research & Development (ORD) - National Health and Environmental Effects Research Laboratory (NHEERL)
Contact position: GIS Analyst


Contact address:
Address type: mailing and physical address
Address:
200 S.W. 35th St.
City: Corvallis
State or province: OR
Postal code: 97333

Contact voice telephone: (541) 754-4469


Contact electronic mail address: weber.marc@epa.gov


Contact instructions:
http://www.epa.gov/

Resource description: Downloadable Data


Distribution liability:
Although these data have been processed successfully on a computer system at the Environmental Protection Agency, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is strongly recommended that careful attention be paid to the contents of the metadata file

Standard order process:
Digital form:
Digital transfer information:
*Transfer size: 50.748
*Dataset size: 50.748

Back to Top
Metadata Reference Information:


Metadata date: 20101129
Metadata future review date: 20140920


*Language of metadata: en


Metadata contact:
Contact information:
Contact person primary:
Contact person: Colleen Burch Johnson
Contact organization: SRA / Raytheon Contractors to US EPA
Contact organization primary:
Contact person: REQUIRED: The person responsible for the metadata information.
Contact organization: REQUIRED: The organization responsible for the metadata information.
Contact position: GIS Analyst


Contact address:
Address type: mailing and physical address
Address:
200 S.W. 35th St
City: Corvallis
State or province: OR
Postal code: 97333

Contact voice telephone: (541) 754-4454


Contact electronic mail address: johnson.colleen@epa.gov


Contact instructions:
http://www.epa.gov/

Metadata standard name: FGDC Content Standards for Digital Geospatial Metadata
Metadata standard version: FGDC-STD-001-1998
Metadata time convention: local time


Metadata extensions:
*Online linkage: http://www.esri.com/metadata/esriprof80.html
*Profile name: ESRI Metadata Profile

Back to Top